Grandstream Networks HT503V2 ANALOG TELEPHONE ADAPTER User Manual

Grandstream Networks, Inc. ANALOG TELEPHONE ADAPTER

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HT503V2 User Manual

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FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 3 of 59 CALL FEATURES .................................................................................... 25 CONFIGURATION GUIDE ........................................................................ 27 CONFIGURING HT503 THROUGH VOICE PROMPT ....................................................................... 27 CONFIGURING HT503 WITH WEB BROWSER ................................................................................ 27 ACCESS THE WEB CONFIGURATION MENU ........................................................................... 28 DEFINITIONS ...................................................................................................................................... 29 SAVING THE CONFIGURATION CHANGES...................................................................................... 53 REBOOTING FROM REMOTE ........................................................................................................... 53 CONFIGURATION THROUGH A CENTRAL SERVER ....................................................................... 54 SOFTWARE UPGRADE ........................................................................... 55 FIRMWARE UPGRADE THROUGH TFTP/HTTP/HTTPS .................................................................. 55 INSTRUCTIONS FOR LOCAL FIRMWARE UPGRADE ..................................................................... 56 CONFIGURATION FILE DOWNLOAD ................................................................................................ 56 FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX .................................................. 57 MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD .............................................. 57 RESTORE FACTORY DEFAULT SETTING ............................................. 58 FACTORY RESET ............................................................................................................................... 58 RESET BUTTON ................................................................................................................................. 58 IVR COMMAND ................................................................................................................................... 58

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 4 of 59 TABLE OF FIGURES HT503 User Manual Figure 1: CONNECTING THE HT503 ............................................................................................ 10 Figure 2: INTERCONNECTION DIAGRAM OF THE HT503 ......................................................... 11 Figure 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION ........................................................... 33 TABLE OF TABLES HT503 User Manual Table 1: DEFINITIONS OF THE HT503 CONNECTORS ............................................................. 10 Table 2: HT503 LED DEFINITIONS .............................................................................................. 11 Table 3: HT503 TECHNICAL SPECIFICATIONS .......................................................................... 12 Table 4: HT503 HARDWARE SPECIFICATION ........................................................................... 14 Table 5: HT503 IVR MENU DEFINITIONS ................................................................................... 15 Table 6: HT503 CALL FEATURE DEFINITIONS .......................................................................... 25 Table 7: STATUS PAGE ................................................................................................................ 29 Table 8: BASIC SETTINGS ........................................................................................................... 30 Table 9: ADVANCED SETTINGS .................................................................................................. 33 Table 10: FXS PORT SETTINGS .................................................................................................. 37 Table 11: FXO PORT Settings....................................................................................................... 45 TABLE OF GUI INTERFACES HT503 User Manual (http://www.grandstream.com/products/ht_series/ht503/documents/ht503_gui.zip) 1. SCREENSHOT OF CONFIGURATION LOGIN PAGE 2. SCREENSHOT OF STATUS PAGE 3. SCREENSHOT OF BASIC SETTINGS CONFIGURATION PAGE 4. SCREENSHOT OF ADVANCED SETTINGS CONFIGURATION PAGE 5. SCREENSHOT OF FXS ACCOUNT CONFIGURATION 6. SCREENSHOT OF FXO ACCOUNT CONFIGURATION 7. SCREENSHOT OF CALL PROGRESS TONES CONFIGURATION PAGE 8. SCREENSHOT OF SAVED CONFIGURATION CHANGES 9. SCREENSHOT OF REBOOT PAGE

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 5 of 59 GNU GPL INFORMATION HT503 firmware contains third-party software licensed under the GNU General Public License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license. Grandstream GNU GPL related source code can be downloaded from Grandstream web site from: http://www.grandstream.com/support/faq/gnu_gpl .

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 6 of 59 CHANGE LOG This section documents significant changes from previous versions of HT503 user manuals. Only major new features or major document updates are listed here. Minor updates for corrections or editing are not documented here. CHANGES FROM 1.0.7.6 USER MANUAL  Added option to enable/disable SIP NOTIFY Authentication. [Error! Reference source not found.]  Added option [Use Configured IP ] in DNS mode. Added configurable parameter [Primary IP][Backup IP1][Backup IP2]  Added option to set [Reregister before Expiration] CHANGES FROM 1.0.6.8 USER MANUAL  Added the option to enable/disable hook flash. [Enable Hook Flash]  Added two CPE SSL configuration [CPE SSL Certificate][CPE SSL Private Key]  Added a configuration parameter to set the [Connection Request Port]  Removed DHCP Domain from Web UI  Removed Enable Ring-transfer from Web UI  Added a configuration parameter to set the [Offhook Auto-Dial Delay]  Changed the SSL Web UI decription to [SIP TLS Certificate][SIP TLS Private Key] and [SIP TLS Private Key Password]  Added [CPE] version to Software Version on Web UI.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 7 of 59 WELCOME Thank you for purchasing Grandstream’s HT503, the affordable, feature rich, Analog Telephone Adaptor/IAD. The HT503 combines a sleek design with the latest technology to offer more advanced telephony features and significantly better integrated router performance than its predecessor – the HT488. It is the second ATA/IAD in the HandyTone 50x series. The HT503 functions as a true 3-in-1 gateway for PSTN network, analog telephone FXS interface and IP network. It enables remote call origination and termination from/to PSTN and supports the feature of “hop-on/hop-off” calling. This manual will help you learn how to operate and manage your HT503 Analog Telephone Adaptor/IAD and make the best use of its many upgraded features including simple and quick installation, 3-way conferencing, and remote call origination and “hop-on/hop-off” calling using the programmable PSTN FXO port. This HT503 is very easy to manage and configure, and is specifically designed to be an easy to use and affordable VoIP solution for both the residential user and the remote user. This document is subject to changes without notice. The latest electronic version of this user manual can be downloaded from the following location: http://www.grandstream.com/products/ht_series/ht503/documents/ht503_usermanual_english.pdf SAFETY COMPLIANCS The HT503 adaptor complies with FCC/CE and various safety standards. The HT503 power adaptor is compliant with UL standard. Only use the universal power adapter provided with the HT503 package. The manufacturer’s warranty does not cover damages to the phone caused by unsupported power adaptors. WARRANTY If you purchased your HT503 from a reseller, please contact them for replacement, repair or refund. If you purchased the product directly from Grandstream, contact your Grandstream Sales and Service Representative for an RMA (Return Materials Authorization) number before you return the product. Grandstream reserves the right to remedy warranty policy without prior notification. Caution: Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could avoid your manufacturer warranty.  This document contains links to Grandstream GUI Interfaces. Please remember to download these examples from http://www.grandstream.com/products/ht_series/ht503/documents/ht503_gui.zip for

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 8 of 59 your reference.  This document is subject to change without notice. The latest electronic version of this user manual is available for download from the following location: http://www.grandstream.com/products/ht_series/ht503/documents/ht503_usermanual_english.pdf  Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, Inc. is not permitted.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 9 of 59 CONNECT YOUR HT503 EQUIPMENT PACKAGING The HT503 ATA package contains:  One HT503 Main Case  One Universal Power Adaptor  One Ethernet Cable  One HT503 Vertical Stand CONNECTING THE HT503 The HT503 is designed for easy configuration and easy installation. Configure the HT503 following the directions in the Configuration section of this manual. 1. Connect a standard touch-tone analog telephone to the PHONE port. 2. Insert a standard RJ11 telephone cable into the LINE port and connect the other end of the telephone cable to a wall jack. 3. Insert the Ethernet cable into the WAN port of HT503 and connect the other end of the Ethernet cable to an uplink port (a router or a modem, etc.) 4. Connect a PC to the LAN port of HT503 if it is being used as a router. 5. Insert the power adapter into the HT503 and connect it to a wall outlet. The HT503 Analog Telephone Adaptor is an all-in-one VoIP integrated device designed to be a total solution for networks providing VoIP services. The HT503 VoIP features and functions are available using a regular analog telephone.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 10 of 59 HT503 Front View HT503 Back View Display LEDs (Green) RJ-45 Ports 10/100 Mbps Reset Power Supply (12V) RJ11 FXS Port RJ11 FXO Port FIGURE 1: CONNECTING THE HT503 The HT503 has one FXS port and one FXO port. The PHONE port next to the power supply is an FXS port. The LINE port on the back right of the HT503 is an FXO port. Both the FXS port and the FXO port can have a separate SIP account. This is a key feature of HT503 as it supports simultaneous calls on both the FXS port and FXO port. Telephone calls can be originated from or terminated on the PSTN network remotely via the FXO port. TABLE 1: DEFINITIONS OF THE HT503 CONNECTORS 12VDC, 0.5A Power adapter connection LAN Port (RJ-45) Connect the LAN port with an Ethernet cable to your PC. WAN Port (RJ-45) Connect the WAN port to the internal LAN network or router. PHONE (RJ-11) FXS port to be connected to analog phones / fax machines. LINE (RJ-11) FXO port should be connected to the PSTN line

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 11 of 59 TABLE 2: HT503 LED DEFINITIONS POWER LED Indicates Power. Remains ON when power is connected WAN LED Indicates LAN (or WAN) port activity LAN LED Indicates PC (or LAN) port activity PHONE/ LINE LED Indicates the status of the FXS and FXO ports on the back panel. Busy – ON (Solid Green) Available – OFF Slow blinking FXS LEDs indicates voicemail for that port. Note: Slow blinking of POWER, WAN, and LAN LEDs together indicate firmware upgrade/provisioning state. FIGURE 2: INTERCONNECTION DIAGRAM OF THE HT503 Internet ADSL/Cable Modem Ethernet Fax Cordless Phone Analog Phone WAN LAN FXS FXO PSTN Cloud

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 12 of 59 PRODUCT OVERVIEW The HT503 is an affordable, high-quality, integrated IP telephony solution for both the residential customers and the ‘road-warriors’ who need advanced call features between traditional PSTN network and IP network. The HT503 enables IP connectivity for any phone or fax using the FXS port and a web-based GUI for easy configuration and installation. It functions as a true FXO gateway that enables remote call origination and termination from/to PSTN and supports the feature of “hop-on/hop-off” using the programmable FXO port. SOFTWARE FEATURES OVERVIEW The HT503 features 2 SIP account profiles and supports advanced telephony features including caller ID, call waiting, call transfer, 3-way conferencing (with either IP or PSTN calls), and multi-language voice prompts. From a technical standpoint, the HT503 offers a power-outage survivable life line and internet-disconnect survivable fail-over-to-PSTN support, dual 10/100Mbps Ethernet ports with integrated high-performance NAT router, a flexible dial plan and a broad range of popular voice codecs. TABLE 3: HT503 TECHNICAL SPECIFICATIONS Interfaces 1 FXS telephone port (RJ11), 1 FXO PSTN line port (RJ11) with lifeline support Two (2) 10M/100 Mbps ports (RJ45) with integrated Nat router Protocol Support TCP/UDP/IP, RTP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, PPPoE, STUN & TELNET protocols LED Indicators Power, WAN, LAN, PHONE, and LINE RESET Button Factory Reset Button Device Management Web interface or via secure (AES encrypted) central configuration file for mass deployment Support device configuration via built-in IVR, Web browser or central configuration file through TFTP, HTTP or HTTPS Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ, MPLS) Auto/manual provisioning system NAT-friendly remote software upgrade (via TFTP/HTTP/HTTPS) for deployed devices including behind firewall/NAT Syslog support

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 13 of 59 DHCP Server/Client Yes Audio Features Advanced Digital Signal Processing (DSP) Dynamic negotiation of codec and voice payload length Support for G.723, G.729/E, G.711, G.726-40/32/24/16, iLBC, T.38 codecs In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO) Silence Suppression, VAD (voice activity detection), CNG (comfort noise generation), ANG (automatic gain control) Adaptive jitter buffer control Packet delay & loss concealment (PLC) & G.168 compliant Line Echo Cancellation Support volume amplification Support configurable Call Progress Tones Call Handling Features Caller ID display or block, Call waiting caller ID, Call waiting/flash, Call transfer, hold, call forward, do not disturb, 3-way conferencing Network and Provisioning Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT support traversal via STUN Fax over IP T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through, Fax Data pump V.17, V.19, V.27ter, V.29 for T.38 fax relay Security DIGEST authentication and encryption using MD5 and MD5-sess Physical Design Stylish and compact design; small universal power supply, ideal for travel

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 14 of 59 HARDWARE SPECIFICATION The table below lists the hardware specification of HT503. TABLE 4: HT503 HARDWARE SPECIFICATION LAN interface 1xRJ45 10/100 Mbps Port WAN interface 1xRJ45 10/100 Mbps Port FXS telephone port 1 x FXS (RJ11) FXO telephone port (PSTN Port) 1x PSTN pass-through and life line port LED Power, WAN, LAN, PHONE, and LINE (Green) Universal Switching Power Adaptor Input: 100–240 VAC, 50-60 Hz Output: 12VDC, 0.5A, UL certified Dimension 25mm x 115mm x 75mm (when laying flat); 115mm x 25mm x 75mm (standing up) Weight Approximately 0.6lbs (0.3kg) Temperature Operational: 32° - 104°F or 5° – 45°C Storage: 10°–130°F Humidity 10% - 90% (non-condensing) Compliance

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 15 of 59 BASIC OPERATIONS UNDERSTANDING HT503 VOICE PROMPT HT503 has a built-in voice prompt menu for simple device configuration. The voice prompt menu is designed for the FXS port only. To enter the voice prompt menu, press *** from the analog phone connected to the FXS port. TABLE 5: HT503 IVR MENU DEFINITIONS Menu Voice Prompt Options Main Menu “Enter a Menu Option” Press “*” for the next menu option Press “#” to return to the main menu Enter 01-05, 07,10,12-17,47 or 99 menu options 01 “DHCP Mode”, “Static IP Mode” Press “9” to toggle the selection If using “Static IP Mode”, configure the IP address information using menus 02 to 05. If using “Dynamic IP Mode”, all IP address information comes from the DHCP server automatically after reboot. 02 “IP Address “ + IP address The current WAN IP address is announced If using “Static IP Mode”, enter 12 digit new IP address. You need to reset the HT to take affect the new IP address. 03 “Subnet “ + IP address Same as menu 02 04 “Gateway “ + IP address Same as menu 02 05 “DNS Server “ + IP address Same as menu 02 07 Preferred Vocoder Press “9” to move to the next selection in the list:  PCM U / PCM A  iLBC  G.726  G.723  G.729 10 MAC Address Announces the MAC address. 12 WAN Port Web Access Press “9” to toggle between enable / disable

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 16 of 59 13 Firmware Server IP Address Announces current Firmware Server IP address. Enter 12 digit new IP address. 14 Configuration Server IP Address Announces current Config Server Path IP address. Enter 12 digit new IP address. 15 Upgrade Protocol Upgrade protocol for firmware and configuration update. Press “9” to toggle between TFTP / HTTP / HTTPS 16 Firmware Version Firmware version information. 17 Firmware Upgrade Firmware upgrade mode. Press “9” to toggle among the following three options: - always check - check when pre/suffix changes - never upgrade 47 “Direct IP Calling” Enter the IP address to make a direct IP call, after dial tone. (See “Make a Direct IP Call”.) 86 Voice Mail Number of voice mails 99 “RESET” Press “9” to reboot the device; or Enter encoded MAC address to restore factory default setting (See “Restoring Factory Settings”) “Invalid Entry” Automatically returns to main menu NOTE:  “*” shifts down to the next menu option  “#” returns to the main menu  “9” functions as the ENTER key in many cases to confirm an option  All entered digit sequences have known lengths - 2 digits for menu option. For IP address, the "*" key represent the dot "." (Like 192.168.0.26 should be key in like 192*168*0*26). Once all of the digits are collected, the input will be processed.  Key entry cannot be deleted but the phone may prompt error once it is detected

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 17 of 59 PLACING A PHONE CALL PHONE OR EXTENSION NUMBERS There are currently two methods to make an extension number call: a) Dial the numbers directly and wait for 4 (default) seconds. b) Dial the numbers directly, and press # (assuming that “use # as dial key” is selected in the web configuration). Examples:  To dial another extension on the same proxy, such as 1008, simply pick up the attached phone, dial 1008 and then press the # or wait for 4 seconds.  To dial a PSTN number such as 6266667890, you may need a prefix number followed by the phone number. Please check with your VoIP service provider for this information. If your phone is assigned a PSTN-like number such as 6265556789, you will most likely follow the rule 1 + (the number) – 16266667890. Press # or wait for 4 seconds. DIRECT IP CALLS Direct IP calling allows two parties, that is, a FXS Port with an analog phone and another VoIP Device, to talk to each other in an ad hoc fashion without a SIP proxy. Elements necessary to completing a Direct IP Call:  Both HT503 and other VoIP Device, have public IP addresses, or  Both HT503 and other VoIP Device are on the same LAN using private IP addresses, or  Both HT503 and other VoIP Device can be connected through a router using public or private IP addresses (with necessary port forwarding or DMZ). HT503 supports two ways to make Direct IP Calling: Using IVR 1. Pick up the analog phone then access the voice menu prompt by dial “***” 2. Dial “47” to access the direct IP call menu 3. Enter the IP address using format ex. 192*168*0*160 after the dial tone.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 18 of 59 Using Star Code 1. Pick up the analog phone then dial “*47” 2. Enter the target IP address using same format as above. Note: NO dial tone will be played between step 1 and 2. Destination ports can be specified by using “*” (encoding for “:”) followed by the port number. Examples: a) If the target IP address is 192.168.0.160, the dialing convention is *47 or Voice Prompt with option 47, then 192*168*0*160. followed by pressing the “#” key if it is configured as a send key or wait 4 seconds. In this case, the default destination port 5060 is used if no port is specified. b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be: *47 or Voice Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key if it is configured as a send key or wait for 4 seconds. NOTE: When completing direct IP call, the “Use Random Port” should set to “NO”. You can not make direct IP calls between FXS1 to FXS2 since they are using same IP. CALL HOLD This function is applicable on the FXS port for VoIP calls only. While in conversation, pressing the “flash” button on the connected phone (if the phone has that button) places the remote end on hold. Pressing the “flash” button again releases the previously held party and the conversation can resume. If no “flash” button is available, then on-off hook quickly (hook flash) will do the same thing. You may lose the call if ‘hook flash’ is not quick enough. CALL WAITING This function is applicable on FXS port for VoIP calls only. If the call waiting feature is enabled, the user will hear a special stutter tone if there is another call on the line. Press the flash button to place the current party on hold and switch to the other call. Pressing the flash button toggles between two active calls. The HT503 also provides CWCID (call waiting caller ID) information which includes caller ID information in addition to the special stutter tone. The analog phone must support this feature for it to work on the HT503. Both call waiting functions (call waiting and CWCID) are activated and deactivated from the configuration pages menu.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 19 of 59 CALL TRANSFER The HT503 supports both blind transfer and attended transfer. BLIND TRANSFER This function is applicable using the FXS port for VoIP calls only. Assume that parties A and B are in conversation. Party A wants to Blind Transfer Party B to C: 3. A presses FLASH on the analog phone to hear the dial tone. 4. Then A dials *87, then dials C’s number, and then presses # 5. A can hang up. NOTE: “Enable Call Feature” has to be set to “Yes” in web configuration page. ATTENDED TRANSFER This function is applicable on the FXS port for VoIP calls only. Assume that parties A and B are in conversation. Party A wants to Attend Transfer Party B to C: 1. A presses FLASH on the analog phone to get a dial tone; 2. A then dial C’s number followed by #. 3. If C answers the call, A and C are in conversation. Then A can hang up to complete transfer. 4. If C does not answer the call, A can press “flash” back to talk to B. NOTE: When Attended Transfer fails and A hangs up, the HT503 will ring user A back again to remind A that party B is still on the call. Party A can pick up the phone to resume a conversation with party B. 3-WAY CONFERENCING The HT503 supports Bellcore Style 3-way conferencing. Assume that parties A and B are in conversation. Party A (using the HT503) wants to bring C into a 3-way conference: 1. A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial tone.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 20 of 59 2. A dials C’s number then # (or wait for 4 seconds). 3. If C answers the call, then A presses FLASH to bring B, C in the conference. 4. If C does not answer the call, A can press FLASH back to talk to B. 5. If A presses FLASH during the conference, C will be dropped out. 6. If A hangs up, the conference will be terminated for all three parties when configuration “Transfer on Conference Hangup” is set to “No”. If the configuration is set to “Yes”, A will transfer B to C so that B and C can continue the conversation. PSTN PASS THROUGH HT503 supports PSTN pass through using the FXS port. The user can place and receive PSTN calls using analog phone connected to FXS port.  To receive PSTN calls, pick up the phone when it rings;  To complete a PSTN call, press the PSTN access code (*00 is default, or any number configured in the web configuration) to switch to the PSTN line, listen for a dial tone, then dial the number.  If the 503 loses power or lost registration with SIP server, device will switch to mode when PSTN line will be transparently connected directly to phone connected to FXS port. It will function as a jack, enabling a direct connection to the PSTN Line.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 21 of 59 VOIP-TO-PSTN CALLS This function is available using the FXO port. The FXO port functions as a bridge between the Internet and PSTN. The user can remotely use a PSTN line to initiate a call. TO MAKE A VOIP-TO-PSTN CALL: 1. Dial the FXO SIP account phone number to establish the VoIP session. The caller will hear the ring back tone once. Then the caller hears either a special continuous tone or a dial tone. The special continuous tone is played if the pin code is configured, otherwise, the caller will hear a dial tone. 2. Enter the PIN code (if configured under the BASIC configuration page). The caller will hear a dial tone and be connected to the PSTN line if the PIN code is valid. If the PIN code is invalid, the continuous tone is played to prompt caller to enter the PIN code again. The user may try up to 3 times to enter a correct PIN code. After three (3) tries, the HT503 hangs up. 3. After the caller hears a dial tone from PSTN line, the caller can place the next call. 4. The user can hit the # key to identify the end of the pin code or wait 4 seconds for a new dial tone and then dialing the PSTN number. Note:  Users can choose whether or not to apply password protection for VoIP-to-PSTN calls. A PIN (Pin for PSTN calls) consists of up to 8 numeric digits and can be configured using the BASIC SETTINGS of the web configuration page. By default, there is no password protection. (I.e. there is no authentication required for callers on the use of PSTN line through HT503).  When a PIN is configured for VOIP-to-PSTN call flow, the VoIP device that calls into the HT503 FXO account needs to configure RFC2833 or SIP Info for DTMF digit transmission.  The special continuous tone is the prompt to enter a valid PIN code. If a caller doesn’t enter a valid PIN, the HT503 times out after 10 seconds. Users may press the “#” key to indicate the end of an input or wait 4 seconds.  On the web configuration page, if the “Forward to PSTN” is configured, the second stage dialing format is eliminated, so after dialing into the FXO SIP account number, the PSTN number will be called automatically

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 22 of 59 PSTN-TO-VOIP CALLS This function is available using the FXO port. The FXO port functions as a bridge between the Internet and PSTN and enables calls to be passed from the PSTN network to VoIP. The user can make VoIP calls remotely by dialing into the FXO line port on HT503. To Make a PSTN-to-VoIP Call: 1. Make an incoming call to the PSTN line on FXO port. The phone will ring for 4 times by default (this setting is configurable on the FXO port configuration page). 2. If no one answers the call after 4 rings (default configuration), then the caller hears either a special continuous tone (prompting a PIN number) or a dial tone. 3. Enter a valid PIN (if configured under the BASIC configuration page). The caller will hear dial tone and be bridged to VoIP. If an incorrect PIN is input, the continuous tone prompts caller to enter a valid PIN. The caller may try 3 times to enter a valid PIN, if it is invalid the HT503 will hang up. 4. The caller can dial a VoIP number followed by # (or wait for 4 seconds); the VoIP call will be initiated from the SIP account configured on the FXO port. NOTE:  Users can choose whether or not to apply password protection for VoIP-to-PSTN calls. A PIN (Pin for PSTN calls) consists of up to 8 numeric digits and can be configured using the BASIC SETTINGS of the web configuration page. By default, there is no password protection. (I.e. there is no authentication required for callers on the use of PSTN line through HT503).  When a PIN is configured for VOIP-to-PSTN call flow, the VoIP device that calls into the HT503 FXO account needs to configure RFC2833 or SIP Info for DTMF digit transmission.  The special continuous tone is the prompt to enter a valid PIN code. If a caller doesn’t enter a valid PIN, the HT503 times out after 10 seconds. Users may press the “#” key to indicate the end of an input or wait 4 seconds.  On the web configuration page, if the “Forward to VoIP” is configured, the second stage dialing format is eliminated, so after dialing into the FXO SIP account number, the PSTN number will be called automatically

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 23 of 59 ROUTE CALLS TO PSTN The FXO port enables access to the PSTN network. By default, the HT503 is in VoIP mode at off-hook. If “Route Call to PSTN” is configured, certain calls will be initiated from the FXO PSTN line port. This call feature is especially useful for emergency calls or local telephone calls. To use this feature, users need to specify a special rule using the dial plan parameter located under FXS Port configuration page. If the dialed digits match the specified prefix, outbound calls will be initiated from the PSTN line. Note: The route to PSTN feature is only applicable to a phone connected to the FXS Port. The configuration is done using the “dial plan” feature under the FXS tab. An example of the configuration is {L: 911x+}. This shows that only calls that start with 911 are immediately forwarded to the PSTN line. All other numbers will not be routed to the PSTN. An normal # would be: {L: 617x+|x+} or {x+| L: 617x+} For example, if “Route Call to PSTN” is configured as {L: 626x+}, all outgoing calls starting with 626 will be initiated from the PSTN line. FORWARD CALLS TO PSTN Any VOIP call may be forwarded to a specified PSTN number. FXO port should be registered with some preconfigured number (for example 1111). Any VoIP extension can dial this FXO account number and will be automatically forwarded to preconfigured PSTN extension. For example, if the end-user has configured a cell phone number in the field “Forward to PSTN” under BASIC SETTINGS configuration page, all calls will be forwarded to the cell phone number after 4 rings. FORWARD CALLS TO VOIP By default, each incoming PSTN call is received over the FXS port. The end-user may forward such a call to any preconfigured VoIP extension, in case the call is not answered in a certain number of rings. The Default value of the parameter “Number of Rings” is 4. This parameter located under “FXO Port” configuration page. If during 4 rings, the incoming from the PSTN call is not answered, the call will be forwarded to another VoIP number previously configured in the field:”Forward to VoIP”. This parameter

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 24 of 59 can also be found under BASIC SETTINGS configuration page. ONE STAGE DIALING This feature is applicable for VoIP to PSTN calls. Any VoIP extension may dial directly to a local PSTN number if the one-stage dialing feature is activated. This feature is configured under the FXO Configuration page and requires SIP Server configuration and support. The special dial plan feature must be activated in the SIP Server. An outbound call will be sent directly to the assigned FXO port account, where there the HT503 will initiate a call to the local CO. The RequestURI header in the INVITE message contains the phone number used to initiate the call to the local CO. FAX SUPPORT HT503 supports FAX in two modes: 1) T.38 (Fax over IP) and 2) fax pass through. T.38 is the preferred method because it is more reliable and works well in most network conditions. If the service provider supports T.38, please use this method by selecting Fax mode to be T.38 (default). If the service provider does not support T.38, pass-through mode may be used. To send or receive faxes in fax pass through mode, users must select all the Preferred Codecs to be PCMU/PCMA (G.711-µ/a).

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 25 of 59 CALL FEATURES TABLE 6: HT503 CALL FEATURE DEFINITIONS Key Call Features *02 Forcing a Codec (per call) *027110 (PCMU), *027111 (PCMA), *02723 (G723), *02729 (G729), *0272616 (G726-r16), *0272624 (G724-r24), *0272632 (G726-r32), *0272640 (G726-r40), *027201 (iLBC) *03 Disable LEC (pe call) Dial “*03” + ” number ”. No dial tone is played in the middle. *16 Enable SRTP *17 Disable SRTP *30 Block Caller ID (for all subsequent calls) *31 Send Caller ID (for all subsequent calls) *47 Direct IP Calling. Dial “*47” + “IP address”. No dial tone is played in the middle. Detail see Direct IP Calling section on page 12. *50 Disable Call Waiting (for all subsequent calls) *51 Enable Call Waiting (for all subsequent calls) *67 Block Caller ID (per call). Dial “*67” + ” number ”. No dial tone is played in the middle. *82 Send Caller ID (per call). Dial “*82” + ” number ”. No dial tone is played in the middle. *69 Call Return Service: Dial *69 and the phone will dial the last incoming phone number received. *70 Disable Call Waiting (per call). Dial “*70” + ” number ”. No dial tone is played in the middle. *71 Enable Call Waiting (per call). Dial “*71” + ” number ”. No dial tone is played in the middle. *72 Unconditional Call Forward: Dial “*72” and then the forwarding number followed by “#”. Wait for dial tone and hang up. (dial tone indicates successful forward) *73 Cancel Unconditional Call Forward. To cancel “Unconditional Call Forward”, dial “*73”, wait for dial tone, then hang up. *78 Enable Do Not Disturb (DND): When enabled all incoming calls are rejected. *79 Disable Do Not Disturb (DND): When disabled, incoming calls are accepted. *87 Blind Transfer *90 Busy Call Forward: Dial “*90” and then the forwarding number followed by “#”. Wait for dial tone then hang up. *91 Cancel Busy Call Forward. To cancel “Busy Call Forward”, dial “*91”, wait for dial tone, then hang up. *92 Delayed Call Forward. Dial “*92” and then the forwarding number followed by “#”. Wait for dial tone then hang up. *93 Cancel Delayed Call Forward. To cancel Delayed Call Forward, dial “*93”, wait for dial tone, then hang up.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 26 of 59 Flash/Hook Toggles between active call and incoming call (call waiting tone). If not in conversation, flash/hook will switch to a new channel for a new call. # Pressing pound sign will server as Re-Dial key.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 27 of 59 CONFIGURATION GUIDE CONFIGURING HT503 THROUGH VOICE PROMPT DHCP MODE Follow Table 4 with voice menu option 01 to enable HT503 to use DHCP. STATIC IP MODE Follow Table 4 with voice menu option 01 to enable HT503 to use STATIC IP mode, then use option 02, 03, 04 to set up HT503’s IP, Subnet Mask, Gateway respectively. FIRMWARE SERVER IP ADDRESS Select voice menu option 13 to configure the IP address of the firmware server. CONFIGURATION SERVER IP ADDRESS Select voice menu option 14 to configure the IP address of the configuration server. UPGRADE PROTOCOL Select voice menu option 15 to choose firmware and configuration upgrade protocol. User can choose between TFTP, HTTP and HTTPS. FIRMWARE UPGRADE MODE Select voice menu option 17 to choose firmware upgrade mode. There are three options: 1) always check, 2) check only when pre/suffix changes, and 3) never upgrade WAN PORT WEB ACCESS Select voice menu option 12 to enable WAN Port Wed Access of the device configuration pages. CONFIGURING HT503 WITH WEB BROWSER HT503 ATA has an embedded Web server that will respond to HTTP GET/POST requests. It also has embedded HTML pages that allow users to configure the HT503 through a Web browser such as Microsoft’s IE, AOL’s Netscape or Mozilla Firefox installed on Windows or Unix OS. (Macintosh OS is not included).

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 28 of 59 ACCESS THE WEB CONFIGURATION MENU The HT503 HTML configuration page can be accessed via LAN or WAN ports. • From the LAN port: 1. Directly connect a computer to the LAN port 2. Open a command window on the computer 3. Type in “ipconfig /release”, the IP address etc becomes 0 4. Type in “ipconfig /renew”, the computer gets an IP address in 192.168.2.x segment by default 5. Open a web browser, type in the default IP address of the LAN port. http://192.168.2.1. You will see the log in page of the device. • From the WAN port: 1. Follow table 4 to find the WAN side IP address. 2. Open a web browser, type in the WAN side IP address – for example: http://HT503-WAN-IP-Address Note: • WAN side HTTP access is disabled by default for security reason. You can enable HTTP access on the configuration page by setting “WAN side HTTP access” to be YES. • Initial access to the configuration pages is always from the LAN port. The instructions are listed above. • The IVR announces 12 digits IP address, you need to strip out the leading “0” in the IP address. For ex. IP address: 192.168.001.014, you need to type in http://192.168.1.14 in the web browser. Once the HTTP request is entered and sent from a web browser, the user will see a log-in screen. There are two default passwords for the login page: User Level: Password: Web pages allowed: End User Level 123 Only Status and Basic Settings Administrator Level admin Browse all pages The password is case sensitive with maximum length of 25 characters. The factory default password for

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 29 of 59 End User and administrator is “123” and “admin” respectively. Only an administrator can access the “ADVANCED SETTING”, “FXS PORT” and “FXO PORT” configuration pages. NOTE: If you cannot log into the configuration page by using the default password, please check with the VoIP service provider. It is most likely the VoIP service provider has provisioned the device and configured for you therefore the password has already been changed. Only an administrator can access the “ADVANCED SETTING”, “FXS PORT” and “FXO PORT” configuration pages. Please reference the GUI pages using the following link: http://www.grandstream.com/products/ht_series/ht503/documents/ht503_gui.zip. DEFINITIONS This section will describe the options in the Web configuration user interface. As mentioned, a user can log in as an administrator or end-user. Functions available for the end-user are:  STATUS: Displays the network status, account status, software version and MAC-address of the phone  BASIC SETTINGS: Basic preferences such as date and time settings, multi-purpose keys and LCD settings can be set here. Additional functions available to administrators are:  ADVANCED SETTINGS: To set advanced network settings, codec settings and XML configuration settings.  FXS PORT: To configure the FXS port.  FXO PORT: To configure the FXO port. TABLE 7: STATUS PAGE MAC Address The device ID, in HEX format. This is very important ID for ISP troubleshooting. Both LAN and WAN MAC addresses are located here. The LAN MAC address is used for provisioning and is written on the label in the original box as well as on the label located on the back panel of the device. WAN IP Address This field shows IP address of the HT503.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 30 of 59 Product Model This field contains the product model info, such as HT503. Software Version Program: This is the main software release. This number is always used for firmware upgrade. Current release is 1.0.7.6 Boot and Loader are seldom changed. Bootloader: current version is 1.0.0.9. Core: current version 1.0.7.1 Base: current version is 1.0.7.6 CPE: current version is 1.0.1.19 System Uptime This shows system up time since last reboot. PPPoE Link Up This shows whether the PPPoE is up if connected to DSL modem NAT This shows what kind of NAT the HT503 is connected to. It is based on STUN protocol. If the detected NAT is symmetric NAT, STUN will not work and Outbound Proxy needed to make HT503 functioning correctly. Port Status Displays information regarding the individual FXS ports. Port Hook Registration DND Forward Busy Forward Delayed Forward FXS On Hook Registered Yes 613 FXO Idle Registered No 614 • Both FXS port and FXO port are registered with this SIP Server. • FXS Port user has set Do Not Disturb. • FXS Port user has set his calls to be forwarded unconditionally to ext 613. FXO Port user has set his calls to forward to 614 when his phone is busy. TABLE 8: BASIC SETTINGS End User Password This contains the password for end user to access the Web Configuration Menu. User can put new password here. This field is case sensitive with maximum of 25 characters Web Port This is the device’s internal HTTP server port. Default is 80. Telnet Server Default is set to YES. Telnet access is allowed to the device in this case. Used only for special purposes such as debugging and troubleshooting. List of available commands will be shown by pressing >help command from telnet console. IP Address • If DHCP mode is enabled, then all the field values for the Static IP mode are not used (even though they are still saved in the Flash memory.) The HT503 will acquire its IP address from DHCP in the network. • PPPoE settings are usually for DSL/ADSL modem users. The HT503 will attempt to establish a PPPoE session if PPPoE account is set.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 31 of 59 • If Static IP mode is selected, the IP address, Subnet Mask, Default Router IP address, DNS Server 1 (mandatory), DNS Server 2 (optional) fields need to be configured. DHCP hostname This option specifies the name of the client. This field is optional but may be required by some Internet Service Providers. Default is blank. DHCP vendor class ID This option is used by clients and servers to exchange vendor-specific information. Default is blank. PPPoE account ID PPPoE username. Necessary if your ISP requires you to use a PPPoE (Point to Point Protocol over Ethernet) connection PPPoE password PPPoE account password PPPoE Service name This field is optional. If your ISP uses a service name for the PPPoE connection, enter the service name here. Default is blank. Preferred DNS The address of your preferred DNS server. Time Zone This parameter controls how the displayed date/time will be adjusted according to the specified time zone. Self-Defined Time Zone The syntax is: std offset dst [offset], start [/time], end [/time] Default is set to: MTZ+6MDT+5,M3.2.0,M11.1.0 MTZ+6MDT+5, This indicates a time zone with 6 hours offset with 1 hour ahead which is U.S central time. If it is positive (+) if the local time zone is west of the Prime Meridian and negative (-) if it is east. Prime Meridian (A.K.A: International or Greenwich Meridian) M3.2.0,M11.1.0 The 1st number indicates Month: 1,2,3.., 12 (for Jan, Feb, .., Dec) The 2nd number indicates the nth iteration of the weekday: (1st Sunday, 3rd Tuesday…) The 3rd number indicates weekday: 0,1,2,..,6( for Sun, Mon, Tues,..,Sat) Therefore, this example is the DST which starts from the second Sunday of March to the 1st Sunday of November. Language Languages supported with the voice prompt. Device Mode This parameter controls whether the device is working in NAT router mode or Bridge mode. Save the setting and reboot prior to configuring the HT503. NAT Maximum Ports The number of ports that can be managed while in NAT router mode. Range: 0 – 4096, default is 1024. Typically one port per connection. NAT TCP Timeout NAT TCP idle timeout in seconds. Connection will be closed after preconfigured, timeout if not refreshed.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 32 of 59 Range: 0 - 3600 NAT UDP Timeout NAT TCP idle timeout in seconds. Connection will be closed after preconfigured, timeout if not refreshed. Range: 0 – 3600, default is 300 Uplink Bandwidth The maximum uplink bandwidth permitted by the device. This function is disabled by default. The total bandwidth can be set as: 128K, 256K, 512K, 1M, 2M, 3M, 4M, 5M, 10M or 15M. The primary function of this setting is to limit the uplink bandwidth for the device internal system, signaling and NATed traffic. Example: if 512k is configured, there will be at least 512kbps limited for internal system, signaling and NATed traffic. Voice or RTP stream will never be limited. See figure 3. Downlink Bandwidth The maximum downlink bandwidth permitted by the device. This function is disabled by default. The total bandwidth can be set as: 128K, 256K, 512K, 1M, 2M, 3M, 4M, 5M, 10M or 15M. The primary function of this setting is to limit the download bandwidth for the device internal system, signaling and NATed traffic. Example: if 128 is configured, there will be at least 128kbps limited for internal system, signaling and NATed traffic. Voice or RTP stream will never be limited. See figure 3. Enable UPnP When set to “Yes”, the HT503 acts as an UPnP gateway for your UPnP enabled applications. UPnP = “Universal Plug and Play” Reply to ICMP on WAN Port When set to “Yes”, the HT503 responds to the PING command from other computers, but is also made vulnerable to DOS attacks. Default is No. WAN Side HTTP/Telnet Access When set to “Yes”, the user can access the web configuration pages through the WAN port, instead of through the PC port. Warning: this configuration is less secure than the default option. Default is No. Cloned WAN MAC Address This allows the user to change/set a specific MAC address on the WAN interface. Note: Set in Hex format LAN DHCP Base IP Base IP for the LAN port, which functions as default gateway for its LAN. Default value is 192.168.2.1 Note: When the device detects WAN IP is conflicting with LAN IP, the LAN base IP address will be changed based on the network mask -- the effective subnet will be increased by 1. For example; 192.168.2.1 will be changed to 192.168.3.1 if net mask is 255.255.255.0. Then the device will reboot LAN DHCP Start IP Default is 100 LAN DHCP End IP Default is 199 LAN Subnet Mask Sets the LAN subnet mask. Default value is 255.255.255.0 DHCP IP Lease Time The length of time the IP address is assigned to the LAN clients. Value is set in units of hours. Default value is 120 hrs (5 days). DMZ IP: This function forwards all WAN IP traffic to a specific IP address if no matching port is used by HT503 or in the defined port forwarding.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 33 of 59 Port Forwarding: Allows users to forward a matching (TCP/UDP) port to a specific LAN IP address with a specific (TCP/UDP) port. PSTN access code The code to access the PSTN line (Maximum 5 digits). Default is “*00”. Any time user can make PSTN calls from the analog phone connected to FXS port. By default, user may pick up the phone, dial *00, and after obtaining PSTN line ( user will hear regular dial tone) normal PSTN dialing is allowed. PIN for PSTN calls PIN code to bridge from VoIP to PSTN (Maximum 8 digits, No Default) PIN for VoIP calls PIN code to bridge from PSTN to VoIP (Maximum 8 digits, No Default) Unconditional Call Forward to PSTN Calls are unconditionally forwarded to the specified PSTN phone number for all incoming VoIP calls on FXO port. Unconditional Call Forward to VoIP Calls are unconditionally forwarded to the specified VoIP phone number for all incoming PSTN calls. Each incoming call from the PSTN will first ring the analog phone connected to FXS port. This call from the PSTN network will be forwarded to the preconfigured VoIP extension if it is not answered. User can configure the number of rings before forwarding calls to the VoIP extension. Configure number of rings using the “number of rings” parameter located in the FXO Port Configuration page. FIGURE 3: UPLINK/DOWNLINK BANDWIDTH LIMITATION Advanced User configuration includes not only the end user configuration, but also advanced configurations such as: SIP configuration, Codec selection, NAT Traversal Setting and other miscellaneous configuration. TABLE 9: ADVANCED SETTINGS

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 34 of 59 Admin Password Administrator password. Only the administrator can configure the “Advanced Settings” page. Password field is purposely blanked for security reason after clicking update and saved. The maximum password length is 25 characters. Layer 3 QoS This field defines the layer 3 QoS parameter which can be the value used for IP Precedence or Diff-Serv or MPLS. Default value is 48. Layer 2 QoS Layer 2 QoS settings. Default setting is blank. VLAN supported equipment is required when configuring these settings. STUN Server IP address or Domain name of the STUN server. Keep-alive interval This parameter specifies how often the HT503 sends a blank UDP packet to the SIP server in order to keep the NAT “pin hole” open. Default is 20 seconds. Use STUN to detect network activity Use STUN keep-alive to detect WAN side network problems. If keep-alive request does not yield any response for configured number of times, the device will restart the TCP/IP stack. If the STUN server does not respond when the device boots up, the feature is disabled. Firmware Upgrade and Provisioning Enables the HT503 to download firmware or configuration files through either TFTP or HTTP servers. The default method is HTTP. Via TFTP This is the IP address of the configured TFTP server. If this is configured, the HT503 retrieves the new configuration file or new code image from the specified TFTP server at boot time. After 5 attempts, the system will timeout and will start the boot process using the existing code image in the Flash memory. If a TFTP server is configured and a new code image is retrieved, the new downloaded image is saved into the Flash memory. Note: Firmware upgrades may take up to 10 minutes depending on your network environment. On a LAN it usually takes about 2 minutes. Please do NOT interrupt the TFTP upgrade process (especially the power supply) as this will damage the device. Depending on the network environment this process can take up to 15 or 20 minutes. Via HTTP The URL for the HTTP server used for firmware upgrade and configuration via HTTP. For example, http://provisioning.mycompany.com:6688/Grandstream/1.0.6.8 “:6688” is the specific TCP port where the HTTP server is listening; Omit if using default port 80. Note: If Auto Upgrade is set to No, F/W will download at boot time. Via HTTPS The URL of the HTTP server used for firmware upgrade and configuration via a secure HTTP connection. For example, https://provisioning.mycompany.com Note: the HTTPS default port is 443. Firmware Server Path IP address or domain name of firmware server. Config Server Path IP address or domain name of configuration server.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 35 of 59 XML Config File Password The password used for encrypting the XML configuration file using OpenSSL. This is required for the phone to decrypt the encrypted XML configuration file. HTTP/HTTPS User Name The user name for the HTTP/HTTPS server. HTTP/HTTPS Password The password for the HTTP/HTTPS server. Firmware File Prefix Default is blank. If configured, HT503 will request the firmware file with the prefix. This setting is useful for ITSPs. End user should keep it blank. Firmware File Postfix Default is blank. End users should keep it blank. Config File Prefix Default is blank. End users should keep it blank. Config File Postfix Default is blank. End users should keep it blank. Allow DHCP option 66 to override server If set to “Yes”, configuration and upgrade server information can be obtained using DHCP option 66 from DHCP server located in customer’s environment Automatic Upgrade Choose “Yes” to enable automatic upgrade and provisioning. When set to No, HT503 will only do upgrade once at boot up. When “Check every day” or “Check every week” is checked, user can specify “Hour of the day(0-23)” or “Day of the week(0-6)”. Default time is Monday 1AM. There are three options to choose from: “Always check for New Firmware at Boot up”, “Check New Firmware only when F/W pre/suffix changes”, and “Always Skip the Firmware Check”. Authenticate Conf File This protects the configuration from an unauthorized change. If set to “Yes, the configuration file is authenticated before acceptance. Firmware Key Key for firmware encryption. (32 digits in hexadecimal format. End users should keep it blank. SIP TLS Certificate The user specify SSL certificate used for SIP over TLS in X.509 format. SIP TLS Private Key The user specify SSL private key used for SIP over TLS in X.509 format. SIP TLS Private Key Password User specify password to protect the private key above. ACS URL User specify the Auto Configuration Server’s URL (TR-069 protocol) ACS Username User specify the ACS Username ACS Password User specify the ACS password Periodic Inform Enable Default is No. If set to YES, device will send inform packets to the ACS Periodic Inform Interval Frequency that the inform packets will be sent out to the ACS Connection Request Username Set a user name for the ACS to connect to this device Connection Request Password Set a password for the ACS to connect to this device Connection Request Port Set a port number for the ACS to connect to this device, default is 7547 CPE SSL Certificate Configure the SSL authentication of Customer-premises equipment

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 36 of 59 CPE SSL Private Key Configure the SSL Private Key of Customer-premises equipment System Ring Cadence Configuration option for FXS port ring cadence for all incoming calls. (Syntax: c=on1/off1-on2/off2-on3/off3; ) Note : Maximum supported cadences is 3 Call Progress Tones Using these settings, users can configure tone frequencies according to their preference. By default they are set to North American frequencies. These tones should be configured with known values to avoid uncomfortable high pitch sounds. ON is the period of ringing (“On time” in ‘ms’) while OFF is the period of silence. In order to set a continuous tone, OFF should be zero. Otherwise it will ring ON ms and a pause of OFF ms and then repeat the pattern. Example for North America Dial Plan: f1=350@-13,f2=440@-13,c=0/0; Syntax: f1=freq@vol, f2=freq@vol, c=on1/off1-on2/off2-on3/off3; (Note: freq: 0 - 4000Hz; vol: -30 - 0dBm) Note : Maximum supported cadences is 3 Prompt Tone Access Code Key pattern to get Prompt Tone. Maximum 20 digits. No Default. Lock Keypad Update If set to “Yes”, the configuration update via keypad is disabled. Note: some informative options still will be available for users after configuring to Yes. Changing existing configuration will be impossible. Disable Voice Prompt Disables the voice prompt configuration. Default is “No. ” If set to “Yes” accessing integrated voice menu will be impossible. Disable Direct IP Calling Disables the Direct IP Call function. Default is “No.” ” If set to “Yes” to make direct IP call will be impossible. Life Line Mode Life line feature ensures user can place/receive a PSTN call in an emergency situation. 1. If set to “Auto”, in case of power loss or loss of SIP registration, the PSTN line will be seamlessly connected to analog phone connected to FXS port. 2. If set to “Always Connected” the PSTN line will be always connected to the phone connected to FXS port. VoIP calls will not be allowed in this configuration. 3. If set to “Always Disconnected”, user can only place VoIP calls, regardless of any power loss and/or SIP registration problems. User will be unable to place/receive any PSTN calls. NTP server URL or IP address of the NTP server, Used to synchronize the date/time. NTP Update Interval Updates the Network Time Protocol (Values range from 5 – 1440 minutes) Syslog Server The IP address or URL of syslog server, especially useful for ITSP

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 37 of 59 Syslog Level Select the ATA to report the log level. Default is NONE. The level is either one of DEBUG, INFO, WARNING or ERROR. Syslog messages are sent based on the following events:  product model/version on boot up (INFO level)  NAT related info (INFO level)  sent or received SIP message (DEBUG level)  SIP message summary (INFO level)  inbound and outbound calls (INFO level)  registration status change (INFO level)  negotiated codec (INFO level)  Ethernet link up (INFO level)  SLIC chip exception (WARNING and ERROR levels)  memory exception (ERROR level) The Syslog uses USER facility. In addition to standard Syslog payload, it contains the following components: GS_LOG: [device MAC address][error code] error message Ex. May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000] Ethernet link is up Send SIP Log If Syslog is enabled and Send SIP Log is set to YES, then SIP messages will also be delivered via Syslog. Default is set to NO. Download Device Configuration This is a special feature that enables the user to create a text file backup of your existing configuration. TABLE 10: FXS PORT SETTINGS Account Active When set to yes the FXS port is activated. SIP Server This field contains the URL string or the IP address (and port, if different from 5060) of the SIP proxy server. e.g., the following are some valid examples: sip.my-voip-provider.com, or sip:my-company-sip-server.com, or 192.168.1.200:5066 Failover SIP Server This Field contains the URL or the IP address of a second SIP server, this one will be used in case the device loses the connection with the first server. Outbound Proxy IP address or Domain name of Outbound Proxy, or Media Gateway, or Session Border Controller. Used by ATA for firewall or NAT penetration in different network environment. If symmetric NAT is detected, STUN will not work and ONLY Outbound Proxy will work. SIP Transport User can select UDP or TCP or TLS. NAT Traversal (STUN) This setting decides whether the NAT traversal mechanism is activated. It should be set to “Yes” if the device is behind a NAT router. If no outbound proxy is configured, a STUN server needs to be set to activate STUN detection mechanism. Usually ITSP will

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 38 of 59 provide these settings. If this field is set to “Yes”, then the device will periodically send a dummy UDP packet to the SIP server to pinhole the NAT. SIP User ID User account information, provided by VoIP service provider (ITSP), usually has the form of digit similar to phone number or actually a phone number. This field contains the user part of the SIP address for this phone. e.g., if the SIP address is sip:my_user_id@my_provider.com, then the SIP User ID is: my_user_id. Do NOT include the preceding “sip:” scheme or the host portion of the SIP address in this field. Authenticate ID ID used for authentication, usually same as SIP user ID, but could be different and decided by ITSP. Authentication Password Password for ATA to register to (SIP) servers of ITSP. Purposely left blank once saved for security. Maximum length is 25. Name SIP service subscriber’s name which will be used for Caller ID display DNS mode One from the 3 modes available for “DNS Mode” configuration: -A Record (for resolving IP Address of target according to domain name) -SRV (DNS SRV resource records indicates how to find services for various protocols) -NAPTR/SRV (Naming Authority Pointer according to RFC 2915) -Use Configured IP (Use the three configured IP address instead of any DNS query) One mode can be chosen for the client to look up server. The default value is “A Record” Primary IP Configure the primary IP for DNS Mode: Use Configured IP Backup IP1 Configure the first backup IP for DNS Mode: Use Configured IP Backup IP2 Configure the second backup IP for DNS Mode: Use Configured IP Tel URI The default setting is “Disabled”. If the phone has an assigned PSTN Number, this field should be set to “User=Phone” then a “User=Phone” parameter will be attached to the “From header” in the SIP request to indicate the E.164 number. If server supports TEL URI format, then this option needs to be selected. SIP Registration This parameter controls whether the HT503 needs to send REGISTER messages to the proxy server. The default setting is “Yes”. Unregister on Reboot Default is No. If set to yes, the device will first send registration request to remove all previous bindings. Use only if proxy supports this remove bindings request. Outgoing Call w/o Registration This parameter allows users place outgoing calls even when not registered (if allowed by ITSP) but it’s unable to receive incoming calls. Register Expiration This parameter allows the user to specify the time frequency (in minutes) the HandyTone ATA refreshes its registration with the specified registrar. The default interval is 60 minutes (or 1 hour). The maximum interval is 65535 minutes (about 45 days).

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 39 of 59 Reregister before Expiration This parameter allows the user to specify the reregisteration time before expiration. Local SIP port This parameter defines the local SIP port the HT503 will listen and transmit. The default value for FXS port is 5060. Local RTP port This parameter defines the local RTP port pair used by the HandyTone ATA. The default value for FXS port is 5004. Use Random Port Default is No. If set to Yes, the device will pick randomly-generated SIP and RTP ports. This is usually necessary when multiple HandyTone ATAs are behind the same NAT. Refer to Use Target Contact Default is No. If set to “Yes”, then for Attended Transfer, the “Refer-To” header uses the transferred target’s Contact header information. Transfer on conference hangup Default is No. In which case if conference originator hangs up the conference will be terminated. When option YES is chosen, originator will transfer other parties to each other so that B and C can choose either to continue the conversation or hang up. Disable Bellcore Style 3-Way Conference Default is No. you can make a Conference by pressing ‘Flash’ key. If set to Yes, you need to dial *23 + second callee number. Remove OBP from Route Header Default is No. If set to Yes, the Outbound Proxy will be removed from the route header. Support SIP instance ID Default is Yes. If set to Yes, the contact header in REGISTER request will contain SIP Instance ID as defined in IETF SIP Outbound draft. Validate incoming SIP message Default is No. If set to yes all incoming SIP messages will be strictly validated according to RFC rules. If message will not pass validation process, call will be rejected. Check SIP User ID for incoming INVITE Default is No. Check the incoming SIP User ID in Request URI. If they don’t match, the call will be rejected. If this option is enabled, the device will not be able to make direct IP calls. SIP T1 Timeout T1 is an estimate of the round-trip time between the client and server transactions. If the network latency is high, select larger value for more reliable usage. SIP T2 Interval Maximum retransmission interval for non-INVITE requests and INVITE responses. DTMF Payload Type This parameter sets the payload type for DTMF using RFC2833 Preferred DTMF method (in listed order) The HT503 supports up to 3 different DTMF methods including in-audio, via RTP (RFC2833) and via Sip Info. The user can configure DTMF method in a priority list. Disable DTMF Negotiation Default is No. If set to yes, use above DTMF order without negotiation Send Flash Event Default is No. If set to yes, flash will be sent as DTMF event. Enable Call Features Default is Yes. (If Yes, call features using star codes will be supported locally) Offhook Auto-Dial This parameter allows users to configure a User ID or extension number to be automatically dialed when offhook. Please note that only the user part of a SIP address needs to be entered here. The HT503 will automatically append the “@” and the host portion of the corresponding SIP address.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 40 of 59 Note: User will need this IP address when accessing the IVR via the web configuration page. Offhook Auto-Dial Delay Configure the delay time for offhook auto-dial function. Range is 0-60 seconds, default is 0. Proxy-Require SIP Extension to notify SIP server that the unit is behind the NAT/Firewall. Use NAT IP NAT IP address used in SIP/SDP message. Default is blank Use SIP User-Agent Header Used to replace SIP User-Agent Header (No Default) Distinctive Ring Tone Custom Ring Tone 1 to 3 with associate Caller ID: when selected, if Caller ID is configured, then the device will ONLY uses this ring tone when the incoming call is from the Caller ID. System Ring Tone is used for all other calls. When selected but no Caller ID is configured, the selected ring tone will be used for all incoming calls. Distinctive ring tones can be configured not only for matching whole number, but also for matching prefixes. In this case symbol * (star) will be used. If server supports Alert-Info header and standard ring tone set (Bellcore) or distinctive ring tone 1-10 is specified, then the ring tone in the Alert-Info header from server will be used. For example: If configured as *617, Ring Tone 1 will be used in case of call arrived from Massachusetts. Any other incoming call will ring using cadence defined in parameter System Ring Cadence located under Advanced Settings Configuration page. Disable Call Waiting Default is No. Disable Call Waiting Caller ID Default is No. This is to disable the caller ID when a call waiting information arrives. Disable Call Waiting Tone Default is No. This is to disable the stutter Call Waiting Tone when a Call Waiting information arrives. The CWCID information will still be displayed. Disable Reminder Ring for On-Hold Call Default is No. The reminder ring for the on-hold call will not be played when this is set to Yes. Disable Visual MWI If set to “YES”, the MWI information will not be transferred to the analog phone connected to the FXS port. Ring Timeout Sets the time in which an incoming call will stop ringing when not picked up. Default value is 20 seconds. In case this feature activated using * codes (*92 code), the call will be forwarded after this preconfigured amount of time. No Key Entry Timeout Default is 4 seconds. Early Dial Default is No. Use only if proxy supports 484 response. This parameter controls whether the phone will send an early INVITE each time a key is pressed when a user

$FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 41 of 59 dials a number. If set to “Yes”, an INVITE is sent using the dial-number collected thus far. Otherwise, no INVITE is sent until the “(Re-)Dial” button is pressed or after about 5 seconds have elapsed. The “Yes” option should be used ONLY if there is a SIP proxy configured and the proxy server supports 484 Incomplete Address response. Otherwise, the call will likely be rejected by the proxy (with a 404 Not Found error). Note: This feature is NOT designed to work with and should NOT be enabled for direct IP-to-IP calling. Dial Plan Prefix Sets the prefix added to each dialed number. Use # as Dial key This allows users to configure the # key as the “Send” (or “Dial”) key. If set to “Yes”, “#” will send the number. In this case, this key is essentially equivalent to the “Dial” key. If set to “No”, the “#” key can be included as part of a number. Dial Plan Dial Plan Rules: 1. Accept Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d 2. Grammar: x - any digit from 0-9;  xx+ - at least 2 digits number;  xx. – at least 1 digit number.  ^ - exclude;  [3-5] - any digit of 3, 4, or 5;  [147] - any digit 1, 4, or 7;  <2=011> - replace digit 2 with 011 when dialing  < =1> - add a leading 1 to all numbers dialed, vice versa will remove a 1 from the number dialed  | - or • Example 1: {[369]11 | 1617xxxxxxx} Allow 311, 611, 911, and any 10 digit numbers of leading digits 1617 • Example 2: {^1900x+ | <=1617>xxxxxxx} Block any number of leading digits 1900 and add prefix 1617 for any dialed 7 digit numbers • Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} Allow any length of number with leading digit 2 and 10 digit-numbers of leading digit 1 and leading exchange number between 2 and 9; If leading digit is 2, replace leading digit 2 with 011 before dialing. 3. Default: Outgoing - {x+} Example of a simple dial plan used in a Home/Office in the US: { ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 }$

$FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 42 of 59 Explanation of example rule (reading from left to right): • ^1900x. - prevents dialing any number started with 1900 • <=1617>[2-9]xxxxxx - allows dialing to local area code (617) numbers by dialing 7 numbers and 1617 area code will be added automatically • 1[2-9]xx[2-9]xxxxxx |- allows dialing to any US/Canada Number with 11 digits length • 011[2-9]x. - allows international calls starting with 011 • [3469]11 - allow dialing special and emergency numbers 311, 411, 611 and 911 Note: In some cases user wishes to dial strings such as *123 to activate voice mail or other application provided by service provider. In this case * should be predefined inside dial plan feature and the Dial Plan will be: { [x*]+ }. Subscribe for MWI Default is No. When set to “Yes” a SUBSCRIBE for Message Waiting Indication will be sent periodically. Send Anonymous When set to “Yes”, the “From” header along with Privacy and P_Asserted_Identity headers in outgoing INVITE messages will be set to anonymous, blocking Caller ID. Anonymous Call Rejection Default is No. If set to “Yes”, incoming calls with anonymous Caller ID will be rejected with a 486 busy message. Special Feature Default is Standard. Choose the selection to meet some special requirements from Softswitch vendors. Session Expiration Grandstream implemented SIP Session Timer. The session timer extension enables SIP sessions to be periodically “refreshed” via a SIP request (UPDATE, or re-INVITE. Once the session interval expires, if there is no refresh via a UPDATE or re-INVITE message, the session will be terminated. Session Expiration is the time (in seconds) at which the session is considered timed out, if no successful session refresh transaction occurs beforehand. The default value is 180 seconds. Min-SE The minimum session expiration (in seconds). The default value is 90 seconds. Caller Request Timer If selecting “Yes” the phone will use session timer when it makes outbound calls if remote party supports session timer. Callee Request Timer If selecting “Yes” the phone will use session timer when it receives inbound calls with session timer request. Force Timer If selecting “Yes” the phone will use session timer even if the remote party does not support this feature. Selecting “No” will allow the phone to enable session timer only when the remote party support this feature. To turn off Session Timer, select “No” for Caller Request Timer, Callee Request Timer, and Force Timer.$

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 43 of 59 UAC Specify Refresher As a Caller, select UAC to use the phone as the refresher, or UAS to use the Callee or proxy server as the refresher. UAS Specify Refresher As a Callee, select UAC to use caller or proxy server as the refresher, or UAS to use the phone as the refresher. Send Re-INVITE After Fax Default is No, If set to “Yes”, device will send an INVITE with audio vocoders upon completition of Fax to continue session in audio only. Enable Silence Detection for Fax Disconnect For fax machines that do not send a Disconnect when fax is done. This option Enables/Disables the detection of silence in order to know the fax has finished. The silence period is non-configurable and fixed to 7 seconds. Enable 100rel The use of the PRACK (Provisional Acknowledgement) method enables reliability to be offered to SIP provisional responses (1xx series). This is very important if PSTN inter-networking is to be supported. A user’s request to use reliable provisional responses is invoked by the 100rel tag which is appended to the value of the required header of initial signaling messages. Use First Matching Vocoder in 200OK SDP Default is No. If set to “Yes”, device will include only the first match vocoder in its 200OK response, otherwise it will include all match vocoders in same order received in INVITE. Force INVITE Session Timer can be refreshed using INVITE method or UPDATE method. Select “Yes” to use INVITE method to refresh the session timer. Preferred Vocoder The HT503 supports up to 5 different Vocoder types including G.711 A-/U-law, G.726 (Supports bit rates 16, 24, 32 and 40), G.723.1, G.729A/B/E and iLBC. The user can configure Vocoders in a preference list that will be included with the same preference order in SDP message. The first Vocoder is entered by choosing the appropriate option in “Choice 1”. The last Vocoder is entered by choosing the appropriate option in “Choice 8”. Voice Frames per TX This field contains the number of voice frames to be transmitted in a single packet. When setting this value, the user should be aware of the requested packet time (used in SDP message) as a result of configuring this parameter. This parameter is associated with the first vocoder in the above vocoder Preference List or the actual used payload type negotiated between the 2 conversation parties at run time. Default is 2, from 1 to 4 for G711/G726/G729 only For example: if this field is set to be 2 and if the first vocoder chosen is G729 or G711 or G726, then the “ptime” value in the SDP message of an INVITE request will be 20ms (2 x10ms) If the configured voice frames per TX exceeds the maximum allowed value, the ATA will not accept it and will use and save the precedent configured allowed value for the corresponding first vocoder choice.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 44 of 59 G723 Rate This defines the encoding rate for G723 vocoder. Default setting is 6.3kbps. iLBC Frame Size This sets the iLBC size in 20ms or 30ms iLBC Payload Type This defines payload type for iLBC. Default value is 97. The valid range is between 96 and 127. AAL2-G726-16 Payload Type Defines payload type for AAL2-G726-16. Default value is 100. Range is from 96 to 127. AAL2-G726-24 Payload Type Defines payload type for AAL2-G726-24. Default value is 99. Range is from 96 to 127. AAL2-G726-32 Payload Type Defines payload type for AAL2-G726-24. Default value is 104. Range is from 96 to 127. AAL2-G726-40 Payload Type Defines payload type for AAL2-G726-40. Default value is 103. Range is from 96 to 127. G729E Payload Type Defines payload type for G729E. Default value is 102. Range is from 96 to 127 VAD Default is No. VAD allows detecting the absence of audio and conserves bandwidth by preventing the transmission of “silent packets” over the network. Symmetric RTP Default is No. When set to “Yes” the device will change the destination to send RTP packets to the source IP address and port of the inbound RTP packet last received by the device. Fax Mode T.38 (Auto Detect) FoIP by default, or fax Pass-Through (must use PCMU/PCMA) Fax Tone Detection Mode Default is Callee. This decides whether Caller or Callee sends out the re-invite for T.38 or Fax Pass-Through. Jitter Buffer Type Select either Fixed or Adaptive based on network conditions. Jitter Buffer Length Select Low, Medium, or High based on network conditions.  High (initial 200ms, min 40ms, max 600ms) Note: not all vocoders can meet the high requirement  Medium (initial 100ms, min 20ms, max 200ms) Low (initial 50ms, min 10ms, max 100ms) SRTP Mode Secure RTP protocol used for media transmission over VoIP. Disabled by default. Other modes are: enabled but not forced & enabled and forced. SLIC Setting Dependent on standard phone type (and location). Called ID Scheme Bellcore/Telcordia, ETSI-FSK, ETSI-DTMF, SIN 227 – BT, & NTT Japan Caller ID TX Level (dB) A value of level for Caller ID information sent by a FXS port to phone connected to it. (-40 – 0dB. Default -20dB) Polarity Reversal If set to “Yes”, polarity will be reversed upon call establishment and termination. Default is No. Loop Current Disconnect Set it to “Yes” of the traditional PBX you are using with HT503 uses this method for signaling call termination. Default is No. Loop Current Disconnect A configurable period of time in which the FXS port will drop off voltage on the line to

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 45 of 59 Duration indicate to the local party that the call is disconnected from the remote side. (100-10000 ms. Default 200 ms) Enable Hook Flash Default is Yes. If set to “No”, FLASH button could only be used for terminating calls. Hook Flash Timing The time period when the cradle is pressed (Hook Flash) to simulate a FLASH. Adjust this time value to prevent unwanted activation of the Flash/Hold and automatic phone ring-back. On Hook Timing On-hook timing is the minimum time for an on-hook event to be validated. Gain Voice path volume adjustment. • Rx is a gain level for signals transmitted by FXS • Tx is a gain level for signals received by FXS. Default = 0dB for both parameters. Loudest volume: +6dB Lowest volume: -6dB. User can adjust volume of call on either end using the Rx Gain Level parameter and the Tx Gain Level parameter located on the FXS Port Configuration page. If call volume is too low when using the FXS port (ie. the ATA is at user site), adjust volume using the Rx Gain Level parameter under the FXS Port Configuration page. If voice volume is too low at the other end, user may increase the far end volume using the Tx Gain Level parameter under the FXS Port Configuration page. Disable Line Echo Canceller (LEC) Default is No. If set to “Yes” LEC will be disabled per call base. Recommended for FAX/Data calls. Ring Tones This function lets you configure ring or tone frequencies according to preference. By default tones are set to North American frequencies. Frequencies should be configured with known values to avoid high pitch sounds. TABLE 11: FXO PORT SETTINGS Account Active When set to “Yes” the FXO port is activated. SIP Server SIP Server’s IP address or Domain name provided by VoIP Service Provider. Failover SIP Server This Field contains the URL or the IP address of a second SIP server, this one will be used in case the device loses the connection with the first server. Prefer Primary SIP Server Default is no. If set to yes it will register to Primary Server if registration with Failover server expires Outbound Proxy IP address or Domain name of Outbound Proxy, or Media Gateway, or Session Border Controller. Used by HT503 for firewall or NAT penetration in different network environments. If symmetric NAT is detected, STUN will not work and ONLY way to correct the problem is to use the outbound proxy. SIP Transport User can select UDP, TCP or TLS

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 46 of 59 NAT Traversal (STUN) This parameter defines whether or not the HT503 NAT traversal mechanism is activated. If set to “Yes” with a STUN server also specified, the HT503 will perform according to the STUN client specification. Using this mode, the embedded STUN client will detect if and what type of firewall/NAT is being used. If the detected NAT is a Full Cone, Restricted Cone, or a Port-Restricted Cone, the HT503 will use its mapped public IP address and port in all of its SIP and SDP messages. If the NAT Traversal field is set to “Yes” with no specified STUN server, the HT503 will periodically (every 20 seconds or so) send a blank UDP packet (with no payload data) to the SIP server to keep the “hole” on the NAT open. SIP User ID User account information, provided by VoIP service provider (ITSP). Usually in the form of digit similar to phone number or actually a phone number. Authenticate ID The SIP service subscriber’s ID used for authentication. Can be identical to or different from SIP User ID. Authenticate Password SIP service subscriber’s account password. Name SIP service subscriber’s name for Caller ID display. DNS mode One from the 3 modes available for “DNS Mode” configuration: -A Record (for resolving IP Address of target according to domain name) -SRV (DNS SRV resource records indicates how to find services for various protocols) -NAPTR/SRV (Naming Authority Pointer according to RFC 2915) One mode can be chosen for the client to look up server. The default value is “A Record”. Tel URI The default setting is “Disabled”. If the phone has an assigned PSTN Number, this field should be set to “User=Phone” then a “User=Phone” parameter will be attached to the “From header” in the SIP request to indicate the E.164 number. If server supports TEL URI format, then this option needs to be selected. SIP Registration Controls whether the HT503 needs to send REGISTER messages to the proxy server. The default setting is Yes. Unregister on Reboot Default is No. If set to Yes, the SIP user’s registration information will be cleared on reboot. Outgoing Call Without Registration Default is No. If set to “Yes,” user can place outgoing calls even when not registered (if allowed by ITSP) but is unable to receive incoming calls. Register Expiration This parameter allows the user to specify the time frequency (in minutes) the HT503 refreshes its registration with the specified registrar. The default interval is 60 minutes (or 1 hour). The maximum interval is 65535 minutes (about 45 days). SIP registration failure retry wait time This parameters allows the user to specify the time frame (in seconds) the HT503 will wait before sending another SIP registration INVITE in case the first INVITE fails. Local SIP Port Defines the local SIP port the HT503 will listen and transmit. The default value for FXS port is 5062.

FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 47 of 59 Local RTP Port This parameter defines the local RTP port pair used by the HandyTone ATA. The default value for FXO port is 5012. Use Random Port This parameter forces the random generation of both the local SIP and RTP ports when set to Yes. This is usually necessary when multiple HT503 units are behind the same NAT. Refer to Use Target Contact Default is No. If set to YES, then for Attended Transfer, the “Refer-To” header uses the transferred target’s contact header information. Remove OBP from Route Header Default is No. If set to Yes, the Outbound Proxy will be removed from the route header. Support SIP instance ID Default is Yes. If set to Yes, the contact header in REGISTER request will contain SIP Instance ID as defined in IETF SIP Outbound draft. Validate incoming message Default is No. If set to yes all incoming SIP messages will be strictly validated according to RFC rules. If message will not pass validation process, call will be rejected. Check SIP User ID for incoming INVITE Default is No. Check the incoming SIP User ID in Request URI. If they don’t match, the call will be rejected. If this option is enabled, the device will not be able to make direct IP calls. SIP T1 Timeout T1 is an estimate of the round-trip time between the client and server transactions. If the network latency is high, select larger value for reliable usage. SIP T2 Interval Maximum retransmission interval for non-INVITE requests and INVITE responses. DTMF Payload Type Sends DTMF using RFC2833 Preferred DTMF method (in listed order) The HT503 supports up to 3 different DTMF methods including in-audio, via RTP (RFC2833) and via Sip Info. User can configure DTMF method in a priority list. Disable DTMF Negotiation Default is No. If set to yes, use above DTMF order without negotiation Proxy Require SIP Extension to notify SIP server that the unit is behind a NAT/Firewall. Use NAT IP NAT IP address used in SIP/SDP message. Default is blank. Use SIP User-Agent Header Used to replace SIP User-Agent Header (No Default) Ring Timeout Sets the time in which an incoming from PSTN call will stop ringing when not picked up. Early Dial Default is No. Use only if proxy supports 484 response. This parameter controls whether the phone will send an early INVITE each time a key is pressed when a user dials a number. If set to “Yes”, an INVITE is sent using the dial-number collected thus far. Otherwise, no INVITE is sent until the “(Re-)Dial” button is pressed or after about 5 seconds have elapsed. The “Yes” option should be used ONLY if there is a SIP proxy configured and the proxy server supports 484 Incomplete Address response. Otherwise, the call will likely be rejected by the proxy (with a 404 Not Found error). Note: This feature is NOT designed to work with and should NOT be enabled for direct

$FIRMWARE VERSION 1.0.9.1 HT503 USER MANUAL Page 48 of 59 IP-to-IP calling. Dial Plan Prefix Sets the prefix added to each dialed number. Use # as Dial Key This allows users to configure the # key as the “Send” (or “Dial”) key. If set to “Yes”, “#” will send the number. In this case, this key is essentially equivalent to the “Dial” key. If set to “No”, the “#” key can be included as part of a number. Dian Plan Dial plans work only for incoming calls from PSTN network. In case unconditional call forward to VoIP is configured, dial plan feature will not work. In case of normal dialing to VoIP, after dialing PSTN number, If using the ‘hop on/hop off’ feature, the dial plan rules affect only the last called number (i.e. the number called after receiving dial tone from the ATA). Dial Plan Rules: 4. Accept Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d 5. Grammar: x - any digit from 0-9; a. xx+ - at least 2 digits number; b. xx. – at least 2 digits number; c. ^ - exclude; d. [3-5] - any digit of 3, 4, or 5; e. [147] - any digit 1, 4, or 7; f. <2=011> - replace digit 2 with 011 when dialing • Example 1: {[369]11 | 1617xxxxxxx} – Allow 311, 611, 911, and any 10 digit numbers of leading digits 1617 • Example 2: {^1900x+ | <=1617>xxxxxxx} – Block any number of leading digits 1900 and add prefix 1617 for any dialed 7 digit numbers • Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} – Allow any length of number with leading digit 2 and 10 digit-numbers of leading digit 1 and leading exchange number between 2 and 9; If leading digit is 2, replace leading digit 2 with 011 before dialing. 6. Default: Outgoing - {x+} Example of a simple dial plan used in a Home/Office in the US: { ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 } Explanation of example rule (reading from left to right): • ^1900x. - prevents dialing any number started with 1900$

Grandstream Networks HT503V2 ANALOG TELEPHONE ADAPTER User Manual

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