Grandstream Networks GXW4216 VOIP GATEWAY User Manual GXW42xx User Manual Draft

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FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 3 of 52 CONFIGURING GXW42XX VIA VOICE PROMPT .............................................................................25CONFIGURING GXW42XX WITH WEB BROWSER..........................................................................25ACCESS THE WEB CONFIGURATION MENU...........................................................................26IMPORTANT SETTINGS .....................................................................................................................26NAT SETTINGS............................................................................................................................26DTMF METHODS.........................................................................................................................27PREFERRED VOCODER (CODEC)............................................................................................27SAVING THE CONFIGURATION CHANGES......................................................................................46REBOOTING FROM REMOTE ...........................................................................................................46CONFIGURATION THROUGH A CENTRAL SERVER .......................................................................46SOFTWARE UPGRADE............................................................................48CONFIGURATION FILE DOWNLOAD................................................................................................49FIRMWARE AND CONFIGURATION FILE PREFIX AND POSTFIX ..................................................49MANAGING FIRMWARE AND CONFIGURATION FILE DOWNLOAD ..............................................50RESTORE FACTORY DEFAULT SETTING..............................................51

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 5 of 52 GNUGPLINFORMATION GXW42XX 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 1.0.0.2 GXW42XX USER MANUAL Page 6 of 52 WELCOMEThank you for purchasing the Grandstream GXW42XX Analog FXS IP Gateway. The GXW42XX offers an easy to manage, easy to configure IP communications solution for any business with virtual and/or branch locations. The GXW42XX supports popular voice codecs and is designed for full SIP compatibility and interoperability with third party SIP providers, thus enabling you to fully leverage the benefits of VoIP technology, integrate a traditional phone system into a VoIP network, and efficiently manage communication costs. This manual will help you learn how to operate and manage your GXW FXS Analog IP Gateway and make the best use of its many upgraded features including simple and quick installation, multi-party conferencing, and direct IP-IP Calling. This IP Analog Gateway is very easy to manage and scalable, specifically designed to be an easy to use and affordable VoIP solution for the small – medium business or enterprise. GATEWAYGXW42XXOVERVIEWThe new GXW42XX series has a compact and quiet design (no fans) and offers superb audio quality, rich feature functionality, strong security protection, and good manageability. It is auto-configurable, remotely manageable and scalable. The GXW42XX features 16,24 or 32-port FXS interface for analog telephones, dual 10M/100Mbps network ports, and 50pins RJ21 analog port (1 for 4216 and 4224, 2 for 4236). In addition, it supports the option of 4 SIP Server profiles, caller ID for various countries/regions, T.38 fax, flexible dialing plans, security protection (SIPS/TLS), comprehensive voice codec including G.711 (a/u-law), G.723.1, G.726(16/24/32/40 bit rates), iLBC and G.729A/B. SAFETYCOMPLIANCEThe GXW42XX is compliant with various safety standards including FCC/CE. Its power adapter is compliant with UL standard. Warning: use only the power adapter included in the GXW42XX package. Use of alternative power adapter may permanently damage the unit. WARRANTYGrandstream has a reseller agreement with our reseller customers. End users should contact the

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 7 of 52 company from whom the product was purchased, 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. Grandstream reserves the right to change the 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 void your manufacturer warranty. • This document is contains links to Grandstream GUI Interfaces. Please download these examples http://www.grandstream.com/products/gxw_series/GXW42XX/documents/GXW42XX_gui.zip for your reference. • This document is subject to change without notice. The latest electronic version of this user manual is located at http://www.grandstream.com/products/gxw_series/GXW42XX/documents/GXW42XX_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 1.0.0.2 GXW42XX USER MANUAL Page 8 of 52 CONNECTYOURGXW42XXGATEWAYConnecting the GXW42XX gateway is easy. Before you begin, please verify the contents of the GXW42XX package. EQUIPMENTPACKAGINGUnpack and check all accessories. Equipment includes: • one device unit • one RJ45 Ethernet cable • one 12V 5A universal power adapter • mount CONNECTTHEGXW42XXFollow these four (4) steps to connect your GXW42XX gateway to the Internet and access the unit’s configuration pages. 1. Connect standard touch-tone analog phones to the GXW42XX’s RJ21 port with a RJ11 to R21 cable. 2. Insert an RJ45 Ethernet cable into the WAN port of GXW42XX and connect the other end to an uplink port (a router or a modem, etc.) 3. Plug the power adapter into the GXW42XX gateway into a power outlet. Follow the instructions from the topic “Configuring GXW 42XX with Web Browser” for initial configuration. The GUI pages will guide you through the remaining steps to set-up your gateway. Examples of the GUI Interfaces can be downloaded from: http://www.grandstream.com/products/gxw_series/GXW42XX/documents/GXW42XX_gui.zip. 

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 9 of 52 FIGURE 1: DIAGRAM OF GXW42XX FRONT & BACK PANEL

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 10 of 52 Pin Signal Pin Signal 1 RING1 26 TIP1 2 RING2 27 TIP2 3 RING3 28 TIP3 4 RING4 29 TIP4 5 RING5 30 TIP5 6 RING6 31 TIP6 7 RING7 32 TIP7 8 RING8 33 TIP8 9 RING9 34 TIP9 10 RING10 35 TIP10 11 RING11 36 TIP11 12 RING12 37 TIP12 13 RING13 38 TIP13 14 RING14 39 TIP14 15 RING15 40 TIP15 16 RING16 41 TIP16 17 RING17 42 TIP17 18 RING18 43 TIP18 19 RING19 44 TIP19 20 RING20 45 TIP20 21 RING21 46 TIP21 22 RING22 47 TIP22 23 RING23 48 TIP23 24 RING24 49 TIP24 25 RING25 50 TIP25 FIGURE 2: 50 PIN TELCO CONNECTOR TABLE 1: DEFINITIONS OF THE GXW CONNECTORS Ethernet Port Connect to the internal LAN network, router or PC. RESET Factory Reset button. Press for 7 seconds to reset factory default settings. DC 12V Power adapter connection Analog Ports Connect to analog phones / fax machines with an RJ21 to RJ11 cable FXS Ports FXS port to be connected to analog phones / fax machines.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 11 of 52 Note: Once the GXW42XX is turned on and configured, the front display panel indicates the status of the unit. TABLE 2: DEFINITIONS OF THE GXW DISPLAY PANEL Power LED Indicates Power. Remains ON when Power is connected and turned ON. Act LED Remains ON after boot-up. LINK LED Indicates Ethernet port activity FXS LED Indicate status of the respective FXS Ports on the back panel Busy - ON (Solid Green) Available - OFF Slow blinking FXS LEDs indicates Voice Mail for that port. NOTE: y All LED lights display green when ON. y Slow blinking of READY, WAN and LAN LED together indicates a firmware upgrade or provisioning state. y LED POWER, READY and WAN lights are ON when device is up and running and successfully registered to the SIP Server. y Slow blinking of READY LED indicates that device has not registered with any SIP Service provider.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 12 of 52 GXW42XXFEATURESThe GXW4000 series is a next generation IP voice gateway that is interoperable and compatible with leading IP-PBXs, Softswitches and SIP platforms. The GXW4200 series FXS gateway is auto-configurable, remotely manageable and scalable. The GXW4200 series gateways come in three models - the GXW4216, GXW4224 and GXW4036, each offering superb voice quality, traditional telephony functionality, easy deployment, and 16, 24 and 32 FXS ports respectively. Each model features flexible dialing plans, integrated call routing to support a pure IP network call and an external power supply. SOFTWAREFEATURESOVERVIEW• 16, 24 or 32 FXS ports • one RJ-45 Ethernet port • 4 configurable SIP profiles) • Supports Voice Codecs: G711(a/µ, Annex I & II), G723.1A, G726 (ADPCM with 16/24/32/40 bit rates), G729 A/B, iLBC • T.38 Fax • Comprehensive Dial Plan support for Outgoing calls. • G.168 Echo Cancellation • Voice Activation Detection (VAD), Comfort Noise Generation (CNG), and Packet Loss Concealment (PLC) • Supports PSTN/PBX analog telephone sets or analog trunks TABLE 3: GXW42XX SOFTWARE FEATURES GXW4216 GXW4224 GXW4232 Telephone Interfaces 16 FXS ports 24 FXS ports 32 FXS ports SIP Provisioning 16 SIP accounts, 4 profiles 24 SIP accounts, 4 profiles 32 SIP accounts, 4 profilesNetwork Interface 10M/100 Mbps, RJ-45 10M/100 Mbps, RJ-45 10M/100 Mbps, RJ-45 Number of Concurrent Calls (except when using SRTP) 4 Concurrent Calls 8 Concurrent Calls 24 Concurrent Calls,

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 13 of 52 Voice over Packet Capabilities Voice Activity Detection (VAD) with CNG (comfort noise generation) and PLC (packet loss concealment), LEC with NLP Packetized Voice Protocol Unit (supports RTP/RTCP and AAL2 protocol), G.168 compliant Echo Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711 Voice Compression G.711 + Annex I (PLC), Annex II (VAD/CNG format) encoder and decoder, G.722 (pending), G.723.1A, G.726(ADPCM with 16/24/32/40 bit rates), G.729A/B, iLBC, G.726 provides proprietary VAD, CNG, and signal power estimation, Voice Play Out unit (reordering, fixed and adaptive jitter buffer, clock synchronization), AGC (automatic gain control),Status output, Decoder controlling via voice packet header DHCP Server/Client DHCP Client only DHCP Client only DHCP Client only 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 Datapump V.17, V.21, V.27ter, V.29 for T.38 fax relay QoS Diffserv, TOS, 802.1 P/Q VLAN tagging Diffserv, TOS, 802.1 P/Q VLAN tagging Diffserv, TOS, 802.1 P/Q VLAN tagging Transport Protocol RTP/RTCP RTP/RTCP RTP/RTCP DTMF Method In-audio, RFC2833, and/or SIP Info In-audio, RFC2833, and/or SIP Info In-Audio, RFC2833, and/or SIP Info IP Signaling SIP (RFC 3261) SIP (RFC 3261) SIP (RFC 3261) Provisioning TFTP, HTTP, HTTPS TFTP, HTTP, HTTPS TFTP, HTTP, HTTPS Security SRTP, IPSEC, TLS/SIPS, HTTPS, 802.1x SRTP, IPSEC, TLS/SIPS, HTTPS, 802.1x SRTP, IPSEC, TLS/SIPS, HTTPS, 802.1x Management Syslog support, HTTP and Telnet access Syslog support, HTTP and Telnet access Syslog support, HTTP and Telnet access Dial Plan Yes Yes Yes 3-Way Conference 3-Way conference with local mixing 3-Way conference with local mixing 3-Way conference with local mixing Caller ID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID Polarity Reversal / Wink Yes Yes Yes EMC EN55022/EN55024 and FCC part15 Class B EN55022/EN55024 and FCC part15 Class B EN55022/EN55024 and FCC part15 Class B Network Connectivity IPv4, IPv6, TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN IPv4, IPv6, TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN IPv4, IPv6, TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, PPPoE, STUN

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 14 of 52 HARDWARESPECIFICATIONThe hardware specifications of the GXW FXS series are detailed in Table 4. TABLE 4: HARDWARE SPECIFICATION OF GXW42XX SERIES GATEWAYS GXW4216 GXW4224 GXW4232 Telephone Interface 16 FXS Ports 24 FXS Ports 32 FXS Ports FXS LEDs 16 24 32 Telco connector One (1) RJ21 (50 pins) One (1) RJ21 (50 pins) Two (2) RJ21 (50 pins) Network interface Single 10/100/1000 BASE-TX,RJ45 Universal Switching Power Adaptor Input: 100-240VAC, 50/60Hz Output: 12V DC, 5.0A Short Haul Loop 2REN: Up to 1km on 24 AWG wire 2REN: Up to 1km on 24 AWG wire 2REN: Up to 1km on 24 AWG wire Mounting Wall mount, Desktop Wall mount, Desktop Rack, Wall mount Environmental Operation: 0°C to 45°C Storage: -20°C to 80°C Humidity: 10％ to 90% Non-condensing Safety UL UL UL Compliance FCC, CE, C-Tick FCC, CE, C-Tick FCC, CE, C-Tick 

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 15 of 52 BASICOPERATIONSUNDERSTANDINGGXWVOICEPROMPTSGXW42XX has a built-in voice prompt menu for simple device configuration. To enter the voice prompt menu, press *** on the standard analog phone connected to any FXS port. TABLE 5: DEFINITIONS OF THE GXW VOICE PROMPTS Menu Voice Prompt User’s Options Main Menu “Enter a Menu Option” Enter “*” for the next menu option Enter “#” to return to the main menu Enter 01 – 05, 07,10 - 17, 47, 86 or 99 Menu option 01 “DHCP Mode”, “PPPoE Mode ”or “Static IP Mode” Enter ‘9’ to toggle the selection If user selects “Static IP Mode”, user need configure all the IP address information through menu 02 to 05. If user selects “Dynamic IP Mode”, the device will retrieve all IP address information from DHCP server automatically when user reboots the device. 02 “IP Address “ + IP address The current WAN IP address is announced Enter 12-digit new IP address if in Static IP Mode. 03 “Subnet “ + IP address Same as Menu option 02 04 “Gateway “ + IP address Same as Menu option 02 05 “DNS Server “ + IP address Same as Menu option 02 07 Preferred Vocoder Enter “9” to go 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 of the unit. 12 WAN Port Web Access Enter “9” to toggle between enabled and disabled 13 Firmware Server IP Address Announces current Firmware Server IP address. Enter 12 digit new IP address. 14 Configuration Server IP Announces current Config Server Path IP address. Enter 12 digit

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 16 of 52 Address new IP address. 15 Upgrade Protocol Upgrade protocol for firmware and configuration update. Enter “9” to toggle between TFTP and HTTP 16 Firmware Version Firmware version information. 17 Firmware Upgrade Firmware upgrade mode. Enter “9” to rotate among the following three options: 1. always check 2. check when pre/suffix changes 3. never upgrade 47 “Direct IP Calling” Enter the target IP address to make a direct IP call, after dial tone. (See “Make a Direct IP Call”.) 700-716/724/732 Phone calls between different ports of the same GW42xx User can make internal calls between different ports inside the same GW even without being registered to SIP server. By dialing *** and 7xx, user can reach colleague connected to port “xx”. 86 Voice Mail Number of voice mails 99 “RESET” Enter “9” to reboot the device; or Enter MAC address to restore factory default setting (See Restore Factory Default Setting section) “Invalid Entry” Automatically returns to Main Menu Five Success Tips when using the Voice Prompt 1. “*” shifts down to the next menu option 2. “#” returns to the main menu 3. “9” functions as the ENTER key in many cases to confirm an option 4. All entered digit sequences have known lengths - 2 digits for menu option and 12 digits for IP address. For IP address, add 0 before the digits if the digits are less than 3 (i.e. - 192.168.0.26 should be key in like 192168000026. No decimal is needed). 5. Key entry can not be deleted but the phone may prompt error once it is detected PLACINGAPHONECALLPHONEOREXTENSIONNUMBERS1. Dial the number directly and wait for 4 seconds (To change the default value, modify the following setting - “No Key Entry Timeout”) or

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 17 of 52 2. Dial the number directly and press # (Use # as dial key” must be configured in web configuration). Examples: 1. Dial a number (e.g. (626) 666-7890), first enter the prefix number (usually 1+ or international code) followed by the phone number. Press # or wait for 4 seconds. Check with your VoIP service provider for further details on prefix numbers. 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: 1. Both GXW42XX and other VoIP Device, have public IP addresses, or 2. Both GXW42XX and other VoIP Device are on the same LAN using private IP addresses, or 3. Both GXW42XX and other VoIP Device can be connected through a router using public or private IP addresses (with necessary port forwarding or DMZ). GXW42XX 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. 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.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 18 of 52 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 FXS ports since they are using same IP. CALLHOLDPlace a call on hold by pressing the “flash” button on the analog phone (if the phone has that button). Press the “flash” button again to release the previously held Caller and resume conversation. If no “flash” button is available, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash. CALLWAITINGCall waiting tone (2 short beeps) indicates an incoming call, if the call waiting feature is enabled. Toggle between incoming call and current call by pressing the “flash” button. First call is placed on hold. Press the “flash” button to toggle between two active calls. CALLTRANSFERBLINDTRANSFERAssume that call Caller A and B are in conversation. A wants to Blind Transfer B to C: 3. Caller A presses FLASH on the analog phone to hear the dial tone. 4. Caller A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds). 5. Caller A will hear the confirm tone. Then, A can hang up. NOTE: “Enable Call Feature” must be set to “Yes” in web configuration page. Caller A can place a call on hold and wait for one of three situations: 1. A quick confirmation tone (similar to call waiting tone) followed by a dial tone. This indicates the transfer is successful (transferee has received a 200 OK from transfer target). At this point, Caller A can either hang up or make another call. 2. A quick busy tone followed by a restored call (on supported platforms only). This means the

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 19 of 52 transferee has received a 4xx response for the INVITE and we will try to recover the call. The busy tone is just to indicate to the transferor that the transfer has failed. 3. Continuous busy tone. The phone has timed out. Note: continuous busy tone does not indicate the transfer has been successful, nor does it indicate the transfer has failed. It often means there was a failure to receive second NOTIFY – check firmware for most recent release. ATTENDEDTRANSFERAssume that Caller A and B are in conversation. Caller A wants to Attend Transfer B to C: 1. Caller A presses FLASH on the analog phone for dial tone. 2. Caller A then dials Caller C’s number followed by # (or wait for 4 seconds). 3. If Caller C answers the call, Caller A and Caller C are in conversation. Then A can hang up to complete transfer. 4. If Caller C does not answer the call, Caller A can press “flash” to resume call with Caller B. NOTE: When Attended Transfer fails and A hangs up, the GXW42XX will ring back user A to remind A that B is still on the call. A can pick up the phone to resume conversation with B. 3WAYCONFERENCINGThe GXW42XX supports Bellcore style 3-way Conference. Instructions for 3-way conference: Assuming that call party A and B are in conversation. A (GXW42XX) wants to bring C in a conference: 1. A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial tone. 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 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.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 21 of 52 FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to "7" … FXS Port #24: SIP UserID and Authenticate ID left blank, Hunting Group set to "2" Hunting Group 1 contains ports 1, 2, 3. Hunting Group 4 contains ports 4, 5, 6. Hunting Group 7 contains ports 7, 8. Please be aware, the choice of 1 for ports 2 and 3, the choice of 4 for ports 5 and 6, the choice 7 for port 8 is required to indicate that the SIP account tied to port marked as “Active” will be used for all members of the same Hunting group. Needless to say, those members of the same Hunting group may not be sequential ports. In following example ports 3, 5 and 7 tied to SIP Account configured in Port #1 marked as “Active”, and ports 4,6,8 tied to SIP Account configured in Port #2 marked as “Active” as well. Example of not sequential configuration of a multiple Hunting Group: FXS Port #1: SIP UserID and Authenticate ID entered, Hunting group set to "Active" FXS Port #2: SIP UserID and Authenticate ID entered, Hunting Group set to "Active" FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to "1" FXS Port #4: SIP UserID and Authenticate ID left blank, Hunting group set to "2" FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to "1" FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to "2" FXS Port #7: SIP UserID and Authenticate ID left blank, Hunting group set to "1" FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to "2" … FXS Port #24: SIP UserID and Authenticate ID left blank, Hunting Group set to "2" Note: A single call directed to the SIP account will NOT result in all ports ringing at the same time. They will ring in the hunting group only. This feature is applicable to incoming calls only. There are two types of hunting groups, Linear and Circular. Linear style will sort the call to the lowest-numbered available line, this is also called “serial hunting”. Circular style will distribute the calls "round-robin". If a call is assigned to line 1, the next call goes to 2 and the next to 3. The succession throughout each of the lines continues even if one of the previous lines becomes available. When the end of the hunt group is reached, the hunting starts over at the first line. Lines are skipped if they are still busy on a previous call. These two hunting styles can be configured from the Profile_x page.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 22 of 52 INTERPORTCALLINGIn some cases a user may want to make phone calls between the phones connected to multiple ports of the same gateway when it is used as a stand alone unit, without the use of a SIP server. This feature will also be applicable when the gateway is used with Hunting Groups and is registered to SIP server only with one master number. In such cases users still will be able to make inter-port calls by using the IVR feature. On the GXW42XX inter-port calling is achieved by dialing *** and 7 plus two extra digits corresponding to the port number. For example the user connected to port 1 can be reached by dialing *** and 701; the user connected to port 24 can be reached by dialing *** 724. SENDINGANDRECEIVINGFAXGXW42XX 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 T.38 as fax mode (default). If the service provider does not support T.38, pass-through mode may be used. If you have problems with sending or receiving Fax, toggle the Fax Tone Detection Mode setting. SUPPORTRADIUSPROTOCOLGXW42XX supports RADIUS for authentication, authorization and billing purposes. Primary and secondary RADIUS server configurations are available to provide redundancy to this feature. In case Primary Radius server becomes unusable, RADIUS requests will be automatically sent to the secondary server. When at least one RADUIS server was configured, the device will allow users to make phone calls only after authorization from RADIUS server has been received. CDR (Call Detail Record) is also sent to the RADIUS server for billing purposes. RAIDUS server can send requests to terminate calls when run out of pre-paid credit. The GXW42XX will be able to work in VoIP billing environment using redundant double server configuration. User will be able to configure primary and secondary RADUIS server IP Addresses or FQDNs. Once at least one RADUIS server was configured, the device will allow users to make phone calls only after permission from RADIUS server has been received. In case Primary Radius server becomes unusable, secondary will take role of primary and will manage credit recourses in the network. Imbedded RADIUS client also supports request generated by Radius server to terminate calls when run out of pre-paid credit.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 23 of 52 CALLFEATURESGXW42XX supports the traditional telephony features available in a PBX as well as additional advanced telephony features. TABLE 6: CALL FEATURES TABLE (STAR CODE) 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 CallerID (for all-config change) *31 Send CallerID (for all-config change)*67 Block CallerID (per call) *82 Send CallerID (per call) *47 Direct IP Calling. Dial “*47” + “IP address”. No dial tone will be played in the middle. Detail see Direct IP Calling section on page 12. *50 Disable Call Waiting (for all-config change) *51 Enable Call Waiting (for all-config change) *69 Call Return Service: Dial *69 and the phone will dial the last incoming phone number received. *70 Disable Call Waiting (Per Call) *71 Enable Call Waiting (Per Call) *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: Dial “*73” and wait for dial tone, then hang up. *74 Enable Paging Call: Dial “*74” and then the destination phone number you want to activate in Paging mode. *78 Enable Do Not Disturb (DND): When enabled all incoming calls will be rejected. *79 Disable Do Not Disturb (DND): When disabled, incoming calls will be accepted.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 24 of 52 *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: dial “*91”. Wait for dial tone. 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: Dial “*93” for a dial tone, then hang up. Flash/Hook If user hears call waiting beep, flash/hook will switch to the new incoming call. Also used to switch to a new channel for a new call. # Pressing pound sign will serve as Re-Dial key.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 25 of 52 CONFIGURATIONGUIDECONFIGURINGGXW42XXVIAVOICEPROMPTDHCP MODE Select voice menu option 01 to enable GXW42XX to use DHCP. STATIC IP MODE Select voice menu option 01 to enable GXW42XX to use STATIC IP mode, then use option 02, 03, 04, 05 to set up IP address, Subnet Mask, Gateway and DNS server 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 and HTTP. FIRMWARE UPGRADE MODE Select voice menu option 17 to choose firmware upgrade mode among the following three options: 1) always check, 2) check when pre/suffix changes, and 3) never upgrade WAN PORT WEB ACCESS (Note: This option is not present on GXW4224 gateway) Select voice menu option 12 to enable WAN Port Wed Access of the device configuration pages. CONFIGURINGGXW42XXWITHWEBBROWSERThe GXW42XX series gateway has an embedded Web server that allows users to configure the GXW42XX through a web browser.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 29 of 52 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, It indicates a time zone with 6 hours offset with 1 hour ahead which is the US central time. It is positive (+) if the local time zone is west of the Prime Meridian and negative (-) if it is east. Prime Meridian (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 etc) The 3rd number indicates Weekday: 0,1, 2, ..,6(for Sun, Mon, Tue, .., Sat) Therefore, this example is the DST which starts from the second Sunday of March to the 1st Sunday of November. Language Default is English. Languages supported with voice prompt. In addition to the Basic Settings configuration page, end users also has access to the Device Status page. TABLE 8: STATUS PAGE MAC Address The device ID in hexadecimal format. This is needed for Internet Service Providertroubleshooting. Note: there are separate MAC addresses for the WAN side and the LAN side. The LAN MAC address will be used for provisioning and can be found on the label on original box and on the label located on the bottom panel of the device. IP Address Shows IP address of GXW42XX Product Model Contains the product model info. Software Version Program: This is the main software release. Boot and Loader are not changed often. System Up Time Shows system uptime since the last reboot. PPPoE Link Up Shows whether the PPPoE connection is running if connected to DSL modem. NAT Shows type of NAT the GXW42XX is connected to via its WAN port. It is based on STUN protocol.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 30 of 52 Port Status Displays relevant information regarding the individual FXS ports. Example: Port Hook Registration DND Forward Busy Forward Delayed ForwardFXS1 On Hook Registered No 613 FXS2 Off Hook Registered No 614 FXS3 On Hook Not RegisteredNo … … … FXS24 On Hook Registered Yes 615 FXS port 24 user has set Do Not Disturb. FXS port 1 user has set his calls to be forwarded unconditionally to ext 613 FXS port 2 user has set his calls to be forwarded to 614 when his phone is busy. FXS port 3 user is not registered with his SIP Server. 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 Admin Password Administrator password. Only the administrator can configure the “Advanced Settings” page. Password field is purposely left blank for security reasons 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 Value used for layer 2 VLAN tag. Default setting is blank. STUN Server IP address or Domain name of the STUN server. STUN server assists devices behind a NAT firewall or a router to set up calls via VoIP. STUN server is often provided by the VoIP service provider or a public STUN server can be used. For a sample list of public free STUN servers please refer to: http://www.voip-info.org/wiki-STUN Keep-alive interval This parameter specifies the number of seconds after which a new blank UDP packetwill be sent out to the proxy/server port in order to have the port stay open and the device remain reachable. Default is 20 seconds.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 31 of 52 Use STUN to detect network connectivity 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 & Provisioning Enables GXW42XX to download firmware or configuration file using either the TFTP or HTTP/S protocols. Via TFTP Server This is the IP address of the configured TFTP server. If selected and it is non-zero or not blank, the GXW42XX 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 then it 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: Do NOT interrupt the firmware upgrade process (especially the power supply) as this will damage the device. Depending on the network environment this process may take up to 15 or 20 minutes. Via HTTP or HTTPS Server The URL for the HTTP server used for firmware upgrade and configuration via HTTP. Note: If Auto Upgrade is set to No, GXW42XX will only do HTTP download once at boot up. Firmware Server Path IP address or domain name of firmware server. That URL of the server that hosts the firmware release. The default server is: fm.grandstream.com/gs Config Server Path IP address or domain name of configuration server. The server hosts a copy of the configuration file to be installed on the gateway. The default server is: fm.grandstream.com/gs 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 needed to authenticate withthe HTTP/HTTPS server. HTTP/HTTPS Password The password needed to authenticate with the HTTP/HTTPS server. Firmware File Prefix Default is blank. If configured, GXW42XX will request firmware file with the prefix. This setting is useful for Internet Telephone Service Providers. End users should keep it blank. Firmware File Postfix Default is blank. This setting is useful for Internet Telephone Service Providers. End users should keep it blank.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 32 of 52 Config File Prefix Default is blank. This setting is useful for Internet Telephone Service Providers. End users should keep it blank. Config File Postfix Default is blank. This setting is useful for Internet Telephone Service Providers. End users should keep it blank. Allow DHCP Option 66 to override server If set to “Yes”, configuration and upgrade server’s information can be obtained using DHCP option 66 from DHCP server. This option specifies the URL of the tftp server. Note: If DHCP Option 66 is enabled, the gateway will attempt downloading a configuration file from the server URL provided by DHCP, even though Config Server Path is left blank. Automatic Upgrade Choose “Yes” to enable automatic upgrade and provisioning. When set to No, GXW42XX will only do upgrade once at boot up. When “Yes, daily at hour ___” or “Yes, weekly on day ___” is checked, user can specify “Hour of the day (0-23)” or “Day of the week (0-6)”. Default time is Monday 1AM. When “Yes, Yes, every ___ minutes” is checked, user can specify the time interval between each upgrade check. Default is 10080 minutes. 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 If set to Yes, configuration file is authenticated before being accepted. This protects the configuration from unauthorized modifications. Firmware Key For firmware encryption. It should be 32-digit in Hexadecimal Representation. End user should keep it blank. SSL Certificate The GXW42XX series supports SIP over TLS. It has built-in private key and SSL certificate. The user specified SSL certificate used for SIP over TLS is in X.509 format.SSL Private Key You may also customize the SSL Private Key. The user specified SSL private key used for SIP over TLS is in X.509 format. SSL Private Key Password Enter SSL Private Key password here. 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

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 33 of 52 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 System Ring Cadence Configuration option for all FXS ports ring cadence for all incoming calls. (Syntax: c=on1/off1-on2/off2-on3/off3; [...]) Default is set to c=2000/4000; (US standards) Call Progress Tones Using these settings, user can configure tone frequencies according to user preference. By default, the tones are set to North American frequencies. Frequencies should be configured with known values to avoid uncomfortable high pitch sounds. ONis the period of ringing (ON time in ms) while OFF is the period of silence. In order to set a continuous ring, OFF should be zero. Otherwise it will ring ON ms and a pause of OFF ms and then repeat the pattern. • “Dial tone” • “Ringback tone” • “Busy/Re-order tone” • “Confirmation tone” Please refer the document below to determine your local call progress tones: http://www.itu.int/ITU-T/inr/forms/files/tones-0203.pdf Lock Keypad Update If set to “Yes”, the configuration update via keypad is disabled. 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 Call Disables the Direct IP Call function. Default is “No”. If set to “Yes” direct IP-to-IP calling will not be supported. Failover to FXO Gateway This feature allows users to place an outbound PSTN call in case there is a loss of an active registration (SIP server unreachable) of all FXS profiles. If set to “YES”, when GXW42XX recognizes a loss of registration, all outgoing calls will be routed to an FXO gateway. The use of this option presumes a configured GXW410x or another FXO gateway with an active PSTN line connection. FXO Gateway IP Address or URI of the FXO gateway. NTP server URI or IP address of the NTP (Network Time Protocol) server. Used by the phone to synchronize the date and time. An extensive list of public NTP servers can be found at http://www.ntp.org

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 34 of 52 Syslog Server The IP address or URL of System log server. The server collects system log information from the device. Syslog Level Select the GXW42XX to report the log level. Default is NONE. The level is one of DEBUG, INFO, WARNING or ERROR. Syslog messages are sent based on the following events: 1. product model/version on boot up (INFO level) 2. NAT related info (INFO level) 3. sent or received SIP message (DEBUG level) 4. SIP message summary (INFO level) 5. inbound and outbound calls (INFO level) 6. registration status change (INFO level) 7. negotiated codec (INFO level) 8. Ethernet link up (INFO level) 9. SLIC chip exception (WARNING and ERROR levels) 10. 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 Example: May 19 02:40:38 192.168.1.14 GS_LOG: [00:0b:82:00:a1:be][000] Ethernet link is up Primary RADIUS Server IP Address or FQDN of the primary RADIUS Server Primary RADIUS Auth Port Primary Radius server authentication port. Default value is 1812 Primary RADIUS Acct Port Primary Radius server accounting port. Default value is 1813 Primary Radius Server Secret Special secret string should be preconfigured according to RADIUS Server configuration Secondary RADIUS Server IP Address or FQDN of the secondary RADIUS Server Secondary RADIUS Auth Port Secondary Radius server authentication port. Default value is 1812 Secondary RADIUS Acct Port Secondary Radius server accounting port. Default value is 1813

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 36 of 52 Hunting Group This feature enables the gateway to register all existing FXS ports with the same phone number. Each incoming call will be routed to first available port in Linear or Circular mode. User may configure all ports as members of the same Hunting Group or it may configure different port combinations for more than one Hunting Group. For example: Ports 1, 3 and 5 are members of the same Hunting Group, the rest of the ports may have separate numbers and may be reached independently. Any port, member of a Hunting Group that is not registered with a SIP account, will be able to place outbound calls using the SIP credentials of the primary Hunting Group port. For example: Port 1, 3 and 5 are members of the same Hunting Group. Port 1 is registered with a SIP account. Ports 3 and 5 are not registered. Ports 3 and 5 will be able to place outbound calls using the SIP account of port 1. Select appropriate value for Hunting Group feature. The original SIP account should be set to Active while the group members should be set to the port number of the Active Port. Example configuration of a multiple Hunting group: FXS Port #1: SIP UserID and Authenticate ID entered, Hunting group set to "Active"FXS Port #2: SIP UserID and Authenticate ID left blank, Hunting Group set to "1" FXS Port #3: SIP UserID and Authenticate ID left blank, Hunting Group set to "1" FXS Port #4: SIP UserID and Authenticate ID entered, Hunting group set to "Active"FXS Port #5: SIP UserID and Authenticate ID left blank, Hunting Group set to "4" FXS Port #6: SIP UserID and Authenticate ID left blank, Hunting Group set to "4" FXS Port #7: SIP UserID and Authenticate ID entered, Hunting group set to "Active"FXS Port #8: SIP UserID and Authenticate ID left blank, Hunting Group set to "7" Hunting Group 1 contains ports 1, 2, 3. Hunting Group 4 contains ports 4, 5, 6. Hunting Group 7 contains ports 7, 8. Enable Port If set to No, FXS port will become inactive (Default is set to Yes) Port# FXS Port Number Offhook Auto-dial This feature allows you to automatically dial the number specified in this field as soon as the port is offhooked, i.e. when the receiver on the phone connected to Port# is picked up.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 39 of 52 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 GXW42XX/HT50X 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 Hang up 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 does not pass validation process, call will be rejected. Check SIP user ID for incoming INVITE Default is No. Check the SIP User ID in Request URI. If they don’t match, the call will be rejected. Allow Incoming SIP Messages from SIP Proxy Only Default is No. If incoming SIP message does not match with SIP Server, it will be rejected. 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 Sets the payload type for DTMF using RFC2833. Preferred DTMF method (in listed order) The GXW42XX 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 Hook Flash Event Default is No. If set to yes, flash will be sent as a DTMF event. Enable Call Features Default is Yes. (If Yes, call features using star codes will be supported locally)

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 40 of 52 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. 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. If set to YES Call Waiting indication information will not be provided to analog phone connected to this FXS port. Disable Call Waiting Caller ID Default is No. If set to YES Call Waiting caller ID will not be provided to analog phone connected to this FXS port. Disable Call Waiting Tone Default is No. This is to disable the stutter Call Waiting Tone when a Call Waiting call arrives. The CWCID will still be displayed. Disable Receiver Offhook Tone Default is No. If YES, ROH tone will not be played after off hook for 60 seconds. Disable Reminder Ring for On-Hold Call Default is No. This is to disable the Reminder Ring that is played when a call is waiting on hold and the analog phone goes on-hook. Disable Visual MWI Visual message indicator is a special on-hook caller ID type message that enables and disables the message waiting light on certain phones. GXW42XX has this feature enabled by default. However, certain phones (rare) that do not support it may mistakenly treat this CID signal as an incoming call. A configuration option is needed to turn on MWI in this case. Visual MWI Type This is the type of signal sent to the analog phone to make it turn the lamp ON upon receiving a Voice mail. Check the phone’s manual to find out what signal is supported, FSK (default) or Neon. Note: This is only supported in model GXW4224 ver 4.A or newer.

FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 41 of 52 Ring Timeout Incoming call will stop ringing when not picked up given a specific period of time. Hunting Group Ring Timeout Default is 20 seconds. If call is not answered within this designated time period, the call will be forwarded to the next member of a Hunt Group. Hunting Group Type Linear and Circular. Linear style will sort the call to the lowest-numbered available line, this is also called “serial hunting”. Circular style will distribute the calls "round-robin". If a call is assigned to line 1, the next call goes to 2 and the next to 3. The succession throughout each of the lines continues even if one of the previous lines becomes available. When the end of the hunt group is reached, the hunting starts over at the first line. Lines are skipped if they are still busy on a previous call. These two hunting styles can be configured from the Profile_x page. Delayed Call Forward Wait Timeout 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. Call will be completed within this time interval if no additional key entry occurs. 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 if the user forgets to press the “Re-Dial” button. 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). 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 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”, this “#” key can be included as part of number.

$FIRMWARE VERSION 1.0.0.2 GXW42XX USER MANUAL Page 42 of 52 Dial Plan Dial Plan Rules: 1. Accept Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d 2. Grammar: x - any digit from 0-9; a. xx+ - at least 2 digits number; b. xx. – at least 2 digits number; c. ^ - exclude; d. [3-5] - any digit of 3, 4, or 5; e. [147] - any digit 1, 4, or 7; f. <2=011> - replace digit 2 with 011 when dialing g. < =1> - add a leading 1 to all numbers dialed, vice versa will remove a 1 from the number dialed h. | - or • Example 1: {[369]11 | 1617xxxxxxx} – Allow 311, 611, 911, and any 10 digit numbers of leading digits 1617 • Example 2: {^1900x+ | <=1617>xxxxxxx} – Block any number of leading digits 1900 and add prefix 1617 for any dialed 7 digit numbers • Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} – Allow any length of number with leading digit 2 and 10 digit-numbers of leading digit 1 and leading exchange number between 2 and 9; If leading digit is 2, replace leading digit 2 with 011 before dialing. 3. Default: Outgoing - {x+} Example of a simple dial plan used in a Home/Office in the US: { ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 } Explanation of example rule (reading from left to right): • ^1900x. - prevents dialing any number started with 1900 • <=1617>[2-9]xxxxxx - allows dialing to local area code (617) numbers by dialing 7 numbers and 1617 area code will be added automatically • 1[2-9]xx[2-9]xxxxxx |- allows dialing to any US/Canada Number with 11 digits length • 011[2-9]x. - allows international calls starting with 011 [3469]11 - allow dialing special and emergency numbers 311, 411, 611 and 911 Note: In some cases user wishes to dial strings such as *123 to activate voice mail or other application provided by service provider. In this case * should be predefined inside dial plan feature and the Dial Plan will be: { [x*]+ }.$

Grandstream Networks GXW4216 VOIP GATEWAY User Manual GXW42xx User Manual Draft

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