Comtrend NL-3112U A/VDSL Bonded Router User Manual CT 5374
Comtrend Corporation A/VDSL Bonded Router CT 5374
  
    Comtrend   >  
Contents
- 1. 5.Manual-1
- 2. 5.Manual-2
- 3. 5.Manual-3
5.Manual-1

NexusLink 3112u  
Multi-DSL Bonded Router 
User Manual   
Version A1.1, June 04, 2014 
 261103-009 

1 
Preface 
This manual provides information related to the installation and operation of this 
device.  The individual reading this manual is presumed to have a basic 
understanding of telecommunications terminology and concepts.   
If you find the product to be inoperable or malfunctioning, please contact technical 
support for immediate service by email at INT-support@comtrend.com 
For product update, new product release, manual revision, or software upgrades, 
please visit our website at http://www.comtrend.com  
Important Safety Instructions 
With reference to unpacking, installation, use, and maintenance of your electronic 
device, the following basic guidelines are recommended: 
•  Do not use or install this product near water, to avoid fire or shock hazard.  For 
example, near a bathtub, kitchen sink or laundry tub, or near a swimming pool.  
Also, do not expose the equipment to rain or damp areas (e.g. a wet basement). 
•  Do not connect the power supply cord on elevated surfaces.    Allow it to lie freely.   
There should be no obstructions in its path and no heavy items should be placed 
on the cord.  In addition, do not walk on, step on, or mistreat the cord. 
•  Use only the power cord and adapter that are shipped with this device. 
•  To safeguard the equipment against overheating, make sure that all openings in 
the unit that offer exposure to air are not blocked. 
•  Avoid using a telephone (other than a cordless type) during an electrical storm.  
There may be a remote risk of electric shock from lightening.  Also, do not use 
the telephone to report a gas leak in the vicinity of the leak. 
•  Never install telephone wiring during stormy weather conditions. 
CAUTION: 
  To reduce the risk of fire, use only No. 26 AWG or larger 
telecommunication line cord. 
  Always disconnect all telephone lines from the wall outlet before servicing 
or disassembling this equipment. 
  WARNING 
  Disconnect the power line from the device before servicing.  
  Power supply specifications are clearly stated in Appendix C – 
Specifications.  

2 
Copyright 
Copyright©2014 Comtrend Corporation.  All rights reserved.  The information 
contained herein is proprietary to Comtrend Corporation.   No part of this document 
may be translated, transcribed, reproduced, in any form, or by any means without 
prior written consent of Comtrend Corporation. 
This program is free software: you can redistribute it and/or modify it under the 
terms of the GNU General Public License as published by the Free Software 
Foundation, either version 3 of the License, or (at your option) any later version. 
This program is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more 
details. 
You should have received a copy of the GNU General Public License 
along with this program.  If not, see http://www.gnu.org/licenses/    
NOTE:    This document is subject to change without notice. 
Protect Our Environment 
This symbol indicates that when the equipment has reached the end of  
its useful life, it must be taken to a recycling centre and processed  
separate from domestic waste. 
The cardboard box, the plastic contained in the packaging, and the parts that make 
up this router can be recycled in accordance with regionally established regulations.   
Never dispose of this electronic equipment along with your household waste; you 
may be subject to penalties or sanctions under the law.  Instead, please be 
responsible and ask for disposal instructions from your local government. 
3 
Table of Contents 
CHAPTER 1 INTRODUCTION ........................................................................................................... 6 
1.1 FEATURES ........................................................................................................................................ 7 
CHAPTER 2 INSTALLATION ............................................................................................................. 8 
2.1 HARDWARE SETUP ........................................................................................................................... 8 
2.2 HARDWARE SETUP ........................................................................................................................... 8 
2.3 LED INDICATORS........................................................................................................................... 10 
CHAPTER 3 WEB USER INTERFACE ............................................................................................ 12 
3.1 DEFAULT SETTINGS ....................................................................................................................... 12 
3.2 IP CONFIGURATION ........................................................................................................................ 13 
3.3 LOGIN PROCEDURE ........................................................................................................................ 15 
CHAPTER 4 DEVICE INFORMATION ........................................................................................... 17 
4.1 WAN ............................................................................................................................................. 19 
4.2 STATISTICS ..................................................................................................................................... 20 
4.2.1 LAN Statistics.................................................................................................................. 20 
4.2.2 WAN Service ................................................................................................................... 21 
4.2.3 XTM Statistics ................................................................................................................. 22 
4.2.4 xDSL Statistics ................................................................................................................ 23 
4.3 ROUTE ........................................................................................................................................... 28 
4.4 ARP ............................................................................................................................................... 29 
4.5 DHCP............................................................................................................................................ 29 
4.6 NAT SESSION ................................................................................................................................ 31 
4.7 IGMP PROXY ................................................................................................................................ 32 
4.8 IPV6 .............................................................................................................................................. 33 
4.8.1 IPv6 Info ................................................................................................................................ 33 
4.8.2 IPv6 Neighbor ....................................................................................................................... 34 
4.8.3 IPv6 Route ............................................................................................................................. 35 
4.9 NETWORK MAP ............................................................................................................................. 36 
4.10 WIRELESS .................................................................................................................................... 37 
4.10.1 Station Info .......................................................................................................................... 37 
4.10.2 Site Survey ........................................................................................................................... 38 
CHAPTER 5 BASIC SETUP............................................................................................................... 39 
5.1 WAN SETUP ................................................................................................................................... 40 
5.1.1 WAN Service Setup ................................................................................................................ 41 
5.2 NAT .............................................................................................................................................. 42 
5.2.1 Virtual Servers ................................................................................................................ 42 
5.2.2 Port Triggering ............................................................................................................... 44 
5.2.3 DMZ Host ....................................................................................................................... 46 
5.2.4    IP Address Map .............................................................................................................. 47 
5.2.5     IPSEC ALG ..................................................................................................................... 49 
5.2.6     SIP ALG .......................................................................................................................... 50 
5.3 LAN .............................................................................................................................................. 51 
5.3.1 LAN IPv6 Autoconfig ............................................................................................................. 54 
5.3.2 Static IP Neighbor ................................................................................................................. 57 
5.3.3 UPnP ..................................................................................................................................... 58 
5.4 WIRELESS ...................................................................................................................................... 59 
5.4.1 Basic ...................................................................................................................................... 59 
5.4.2 Security .................................................................................................................................. 61 
5.5 PARENTAL CONTROL...................................................................................................................... 64 
5.5.1 Time Restriction .............................................................................................................. 64 
5.5.2 URL Filter....................................................................................................................... 65 
5.6 HOME NETWORKING ...................................................................................................................... 67 
5.6.1 Print Server ........................................................................................................................... 67 
5.6.2 DLNA ..................................................................................................................................... 67 
5.6.3 Storage Service ...................................................................................................................... 68 
4 
CHAPTER 6 ADVANCED SETUP ..................................................................................................... 69 
6.1 AUTO-DETECTION SETUP ............................................................................................................... 69 
6.2 SECURITY ...................................................................................................................................... 74 
6.2.1 IP Filtering ..................................................................................................................... 74 
6.2.2 MAC Filtering................................................................................................................. 77 
6.3 QUALITY OF SERVICE (QOS) .......................................................................................................... 79 
6.3.1 QoS Queue Setup ............................................................................................................ 80 
6.3.2 QoS Policer .................................................................................................................... 82 
6.3.3    QoS Classification .......................................................................................................... 84 
6.4 ROUTING ....................................................................................................................................... 86 
6.4.1 Default Gateway ............................................................................................................. 86 
6.4.2 Static Route ..................................................................................................................... 87 
6.4.3 Policy Routing ................................................................................................................ 88 
6.4.4 RIP .................................................................................................................................. 89 
6.5 DNS .............................................................................................................................................. 90 
6.5.1 DNS Server ..................................................................................................................... 90 
6.5.2 Dynamic DNS ................................................................................................................. 91 
6.5.3   DNS Entries .................................................................................................................... 92 
6.5.4    DNS Proxy/Relay ............................................................................................................ 93 
6.6 DSL ............................................................................................................................................... 94 
6.7 DSL BONDING ............................................................................................................................... 96 
6.8 INTERFACE GROUPING ................................................................................................................... 97 
6.9 IP TUNNEL ................................................................................................................................... 100 
6.9.1 IPv6inIPv4 ........................................................................................................................... 100 
6.9.2 IPv4inIPv6 ........................................................................................................................... 101 
6.10 CERTIFICATE .............................................................................................................................. 102 
6.10.1 Local ............................................................................................................................. 102 
6.10.2 Trusted CA .................................................................................................................... 104 
6.11 POWER MANAGEMENT .............................................................................................................. 105 
6.12 MULTICAST................................................................................................................................ 106 
6.13 WIRELESS .................................................................................................................................. 108 
6.13.1 Basic .................................................................................................................................. 108 
6.13.2 Security .............................................................................................................................. 110 
6.13.3 WPS ................................................................................................................................... 113 
6.13.4 MAC Filter......................................................................................................................... 114 
6.13.5 Wireless Bridge .................................................................................................................. 116 
6.13.6 Advanced ........................................................................................................................... 117 
CHAPTER 7 DIAGNOSTICS ........................................................................................................... 120 
7.1 DIAGNOSTICS – INDIVIDUAL TESTS ............................................................................................. 120 
7.2 FAULT MANAGEMENT .................................................................................................................. 121 
7.3 UPTIME STATUS ........................................................................................................................... 122 
7.4 PING ............................................................................................................................................ 122 
7.5 TRACE ROUTE ............................................................................................................................. 123 
7.6 SYSTEM UTILIZATION .................................................................................................................. 124 
CHAPTER 8 MANAGEMENT ........................................................................................................ 125 
8.1 SETTINGS ..................................................................................................................................... 125 
8.1.1 Backup Settings............................................................................................................. 125 
8.1.2 Update Settings ............................................................................................................. 126 
8.1.3 Restore Default ............................................................................................................. 126 
8.2 SYSTEM LOG ............................................................................................................................... 127 
8.3 SNMP AGENT ............................................................................................................................. 129 
8.4 TR-069 CLIENT ........................................................................................................................... 130 
8.5 INTERNET TIME ........................................................................................................................... 132 
8.6 ACCESS CONTROL ....................................................................................................................... 133 
8.6.1   Passwords ......................................................................................................................... 133 
8.6.2  Service Access ................................................................................................................... 135 
8.6.3  IP Address ......................................................................................................................... 136 
8.7 UPDATE SOFTWARE ..................................................................................................................... 137 
8.8 REBOOT ....................................................................................................................................... 138 
5 
CHAPTER 9 LOGOUT ..................................................................................................................... 139 
APPENDIX A - FIREWALL ............................................................................................................. 140 
APPENDIX B - PIN ASSIGNMENTS .............................................................................................. 143 
APPENDIX C – SPECIFICATIONS ................................................................................................ 144 
APPENDIX D - SSH CLIENT .......................................................................................................... 146 
APPENDIX E - CONNECTION SETUP ......................................................................................... 147 
APPENDIX F - WPS OPERATION ................................................................................................. 179 
APPENDIX G - PRINTER SERVER ............................................................................................... 184 
6 
Chapter 1 Introduction 
The NexusLink 3112u Multi DSL Bonded Router is a single box solution for triple play 
applications. It features dual xDSL bonded ports that provide twice the xDSL 
bandwidth (ADSL2+ in both ATM/PTM modes and VDSL2 PTM 
8a/8b/8c/8d/12a/12b/17a profiles) over comparable single-port models. With PTM 
mode supported, it can provide better performance than a regular ATM mode router. 
The NexusLink 3112u is equipped with three Fast Ethernet ports, one Gigabit port 
and 802.11n WLAN Access Point (AP). It goes above and beyond with high level 
features such as QoS, VPN and remote management (with TR-069 support). 
7 
1.1 Features 
•      Integrated 802.11n AP  
   (802.11b/g backward-compatible) 
•  Configuration backup and   
  restoration 
•     Automatically switches to   
   ADSL2+/VDSL2 according to the  
   port setting of DSLAM 
•   Up to 16 PVCs and Up to 8 PTM     
  flows 
•  Supports bonded xDSL lines 
•    IPv6 compliant 
•     VDSL2 12a/12b profile support 
•  Printer Server (IPP) 
•     Per-VC packet level QoS 
•  Firmware upgrade and  
   configuration 
•  WPA and 802.1x 
•    Auto PVC configuration 
•      WPS 2.0 
•   UPnP 
•      RADIUS client 
•    IP/MAC address filtering 
•   Up to VDSL2 17a Profile 
•   Dynamic IP assignment 
•   US0 
•   Parental Control 
•PhyR and G.INP 
•   DHCP Server/Client 
• G.Vector 
•   DNS Relay/Proxy 
•  Static routing & RIP/RIP v2 
•   FTP/TFTP server 
•     NAT/PAT 
•   USB mass-storage and file sharing     
  (Samba) 
•  IGMP Snooping/Proxy and fast leave 
•  Embedded SNMPv2 agent 
•  Supports remote administration 
•  HTTPS/HTTP server 
•  Web-based management 
• TR-069/TR-098/TR-111 

8 
Chapter 2 Installation 
2.1 Hardware Setup  
Follow the instructions below to complete the hardware setup. 
Non-stackable 
This device is not stackable – do not place units on top of each other, otherwise 
damage could occur. 
2.2 Hardware Setup  
Follow the instructions below to complete the hardware setup. 
BACK PANEL 
The figure below shows the back panel of the device. 
Power ON 
Press the power button to the OFF position (OUT). Connect the power adapter to the 
power port. Attach the power adapter to a wall outlet or other AC source. Press the 
power button to the ON position (IN). If the Power LED displays as expected then 
the device is ready for setup (see section 2.3 LED Indicators for details). 
Caution 1: If the device fails to power up, or it malfunctions, first verify that the 
power cords are connected securely and then power it on again. If the 
problem persists, contact technical support. 
Caution 2: Before servicing or disassembling this equipment, disconnect all power 
cords and telephone lines from their outlets. 
Reset Button 
Restore the default parameters of the device by pressing the Reset button for 10 
seconds. After the device has rebooted successfully, the front panel should display 
as expected (see section 2.3 LED Indicators for details).   
Reset Button
Power Port 
Ethernet (LAN) Ports 
DSL Port 
Power Button 

9 
NOTE:   If pressed down for more than 60 seconds, the NexusLink 3112u will go 
into a firmware update state (CFE boot mode).  The firmware can then 
be updated using an Internet browser pointed to the default IP address. 
GB ETH Port 
Use RJ45 straight through or crossover MDI/X cable to connect to Ethernet WAN. 
Ethernet (LAN) Ports 
Use 10/100 BASE-T RJ-45 cables to connect up to four network devices (as the GB 
ETH port can also be used). These ports are auto-sensing MDI/X; so either 
straight-through or crossover cable can be used. 
USB Host Port (Type A) 
This port can be used to connect the router to the print server.  
DSL Port  
Connect to a VDSL with this RJ14 Port.  This device contains a micro filter which 
removes the analog phone signal.    If you wish, you can connect a regular telephone 
to the same line by using a POTS splitter. 
FRONT PANEL 
The Wi-Fi & WPS buttons are located on the bottom-left of the front panel, as shown. 
WiFi Switch 
Press this button to enable/disable the wireless LAN (WLAN). 
WPS Button 
Press this button to begin searching for WPS clients. These clients must also enable 
WPS push button mode (see Appendix F - WPS OPERATION for instructions). 

10 
2.3 LED Indicators 
The front panel LED indicators are shown below and explained in the following table. 
This information can be used to check the status of the device and its connections. 
LED 
Color 
Mode 
Function 
POWER 
Green On The device is powered up. 
Off 
The device is powered down. 
Red 
On 
POST (Power On Self Test) failure or other 
malfunction.    A malfunction is any error of 
internal sequence or state that will prevent 
the device from connecting to the DSLAM 
or passing customer data.   
GB ETH 
Green         
(for 1000 
Base-T) 
On 
Powered device connected to the 
associated port. 
Off 
No activity, modem powered off, no cable 
or no powered device connected to the 
associated port. 
Blink 
Traffic is passing. 
Yellow 
(for 10/100 
Base-T) 
On 
Powered device connected to the 
associated port. 
Off 
No activity, modem powered off, no cable 
or no powered device connected to the 
associated port. 
Blink 
Traffic is passing. 
ETH 1-3  Green 
On 
An Ethernet Link is established. 
Off 
An Ethernet Link is not established. 
Blink 
Data transmitting or receiving over 
Ethernet. 
WPS   Green 
On 
WPS enabled. 
Off 
WPS disenabled. 
Blink 
The router is searching for WPS clients. 
WiFi Green 
On 
The wireless module is ready. 
(i.e. installed and enabled). 
Off 
The wireless module is not ready. 
(i.e. either not installed or disabled). 
Blink 
Data transmitting or receiving over WLAN. 
DSL1 
 Green 
On 
The DSL1 link is established. 
Off 
The device is powered down. 
Blink 
DSL1 attempting sync:   

11 
 Flashing at 2 Hz with a 50% duty cycle 
when trying to detect carrier signal flashing at 4 
Hz with a 50% duty cycle when the carrier has 
been detected and the modem is trying to train. 
DSL2 Green 
On 
The DSL2 link is established. 
Off 
The device is powered down. 
Blink 
DSL2 attempting sync:   
 Flashing at 2 Hz with a 50% duty cycle 
when trying to detect carrier signal flashing at 4 
Hz with a 50% duty cycle when the carrier has 
been detected and the modem is trying to train. 
INTERNET 
Green 
On 
IP connected and no traffic detected.  If 
an IP or PPPoE session is dropped due to 
an idle timeout, the light will remain green 
if an VDSL connection is still present. 
Off 
Modem power off, modem in bridged mode 
or VDSL connection not present.  In 
addition, if an IP or PPPoE session is 
dropped for any reason, other than an idle 
timeout, the light is turned off. 
Blink 
IP connected and IP Traffic is passing thru 
the device (either direction) 
Red On 
Device attempted to become IP connected 
and failed (no DHCP response, no PPPoE 
response, PPPoE authentication failed, no 
IP address from IPCP, etc.) 

12 
Chapter 3 Web User Interface 
This section describes how to access the device via the web user interface (WUI) 
using an Internet browser such as Internet Explorer (version 5.0 and later).   
3.1 Default Settings 
The factory default settings of this device are summarized below. 
•  LAN IP address: 192.168.1.1 
•  LAN subnet mask: 255.255.255.0 
•  Administrative access (username: root, password: 12345) 
•  User access (username: user, password: user) 
•  Remote (WAN) access (username: support, password: support) 
•  WLAN access: enabled 
Technical Note 
During power on, the device initializes all settings to default values.  It will then 
read the configuration profile from the permanent storage section of flash memory.  
The default attributes are overwritten when identical attributes with different values 
are configured.  The configuration profile in permanent storage can be created via 
the web user interface or telnet user interface, or other management protocols.  
The factory default configuration can be restored either by pushing the reset button 
for more than ten seconds until the power indicates LED blinking or by clicking the 
Restore Default Configuration option in the Restore Settings screen. 

13 
3.2 IP Configuration 
DHCP MODE 
When the NexusLink 3112u powers up, the onboard DHCP server will switch on. 
Basically, the DHCP server issues and reserves IP addresses for LAN devices, such 
as your PC. 
To obtain an IP address from the DCHP server, follow the steps provided below.   
NOTE: The following procedure assumes you are running Windows XP.  
However, the general steps involved are similar for most operating 
systems (OS). Check your OS support documentation for further details. 
STEP 1:  From the Network Connections window, open Local Area Connection (You 
may also access this screen by double-clicking the Local Area Connection 
icon on your taskbar). Click the Properties button. 
STEP 2:  Select Internet Protocol (TCP/IP) and click the Properties button.  
STEP 3: Select Obtain an IP address automatically as shown below. 
STEP 4:  Click OK to submit these settings. 
If you experience difficulty with DHCP mode, you can try static IP mode instead. 

14 
STATIC IP MODE 
In static IP mode, you assign IP settings to your PC manually. 
Follow these steps to configure your PC IP address to use subnet 192.168.1.x. 
NOTE: The following procedure assumes you are running Windows XP.  
However, the general steps involved are similar for most operating 
systems (OS). Check your OS support documentation for further details. 
STEP 1:  From the Network Connections window, open Local Area Connection (You 
may also access this screen by double-clicking the Local Area Connection 
icon on your taskbar). Click the Properties button. 
STEP 2:  Select Internet Protocol (TCP/IP) and click the Properties button. 
STEP 3: Change the IP address to the 192.168.1.x (1<x<255) subnet with subnet 
mask of 255.255.255.0. The screen should now display as shown below. 
STEP 4:  Click OK to submit these settings. 

15 
 3.3 Login Procedure 
Perform the following steps to login to the web user interface.   
NOTE: The default settings can be found in section 3.1 Default Settings. 
STEP 1:  Start the Internet browser and enter the default IP address for the device 
in the Web address field. For example, if the default IP address is 
192.168.1.1, type http://192.168.1.1. 
NOTE: For local administration (i.e. LAN access), the PC running the browser 
must be attached to the Ethernet, and not necessarily to the device.   
For remote access (i.e. WAN), use the IP address shown on the Device 
Information screen and login with remote username and password. 
STEP 2:  A dialog box will appear, such as the one below.  Enter the default 
username and password, as defined in section 3.1 Default Settings. 
 Click OK to continue. 
NOTE:   The login password can be changed later (see section 8.6.1 Passwords). 

16 
STEP 3:  After successfully logging in for the first time, you will reach this screen. 
You can also reach this page by clicking on the following icon located at the top of 
the screen. 

17 
Chapter 4 Device Information 
You can reach this page by clicking on the following icon located at the top of the 
screen. 
The web user interface window is divided into two frames, the main menu (at left) 
and the display screen (on the right). The main menu has several options and 
selecting each of these options opens a submenu with more selections. 
NOTE:  The menu items shown are based upon the configured connection(s) and 
user account privileges. For example, if NAT and Firewall are enabled, the 
main menu will display the NAT and Security submenus. If either is 
disabled, their corresponding menu(s) will also be disabled. 
Device Info is the first selection on the main menu so it will be discussed first.  
Subsequent chapters will introduce the other main menu options in sequence. 
The Device Info Summary screen displays at startup. 

18 
This screen shows hardware, software, IP settings and other related information. 

19 
4.1 WAN 
Select WAN from the Device Info submenu to display the configured PVC(s). 
Heading 
Description 
Interface  
Name of the interface for WAN 
Description 
Name of the WAN connection 
Type 
Shows the connection type  
VlanMuxId 
Shows 802.1Q VLAN ID 
IPv6 
Shows WAN IPv6 status 
IGMP Shows Internet Group Management Protocol (IGMP) 
status 
MLD 
Shows Multicast Listener Discovery (MLD) status 
NAT 
Shows Network Address Translation (NAT) status 
Firewall 
Shows the status of Firewall 
Status 
Lists the status of DSL link 
IPv4 Address 
Shows WAN IPv4 address 
IPv6 Address 
Shows WAN IPv6 address 

20 
4.2 Statistics 
This selection provides LAN, WAN, ATM and xDSL statistics. 
NOTE: These screens are updated automatically every 15 seconds.  
Click Reset Statistics to perform a manual update. 
4.2.1 LAN Statistics 
This screen shows data traffic statistics for each LAN interface. 
Heading 
Description 
Interface 
LAN interface(s) 
Received/Transmitted:  - Bytes 
  - Pkts 
  - Errs 
  - Drops 
Number of Bytes  
Number of Packets  
Number of packets with errors 
Number of dropped packets  

21 
4.2.2 WAN Service 
This screen shows data traffic statistics for each WAN interface. 
Heading 
Description 
Interface 
WAN interfaces 
Description 
WAN service label 
Received/Transmitted   -  Bytes 
                        -  Pkts 
                        -  Errs 
                        -  Drops 
Number of Bytes  
Number of Packets  
Number of packets with errors 
Number of dropped packets  

22 
4.2.3  XTM Statistics 
The following figure shows ATM (Asynchronous Transfer Mode)/PTM (Packet 
Transfer Mode) statistics. 
XTM Interface Statistics 
Heading 
Description 
Port Number 
ATM PORT (0-3) 
In Octets 
Number of octets received over the interface 
Out Octets 
Number of octets transmitted over the interface 
In Packets 
Number of packets received over the interface 
Out Packets 
Number of packets transmitted over the interface 
In OAM Cells 
Number of OAM Cells received over the interface 
Out OAM Cells 
Number of OAM Cells transmitted over the interface. 
In ASM Cells 
Number of ASM Cells received over the interface 
Out ASM Cells 
Number of ASM Cells transmitted over the interface 
In Packet 
Errors 
Number of packets in Error 
In Cell Errors 
Number of cells in Error 

23 
4.2.4 xDSL Statistics 
The xDSL Statistics screen displays information corresponding to the xDSL type. 
The two examples below (VDSL & ADSL) show this variation. 
VDSL 

24 
 ADSL 
Click the Reset Statistics button to refresh this screen. 
Field 
Description 
Mode 
VDSL, VDSL2 
Traffic Type 
ATM, PTM 
Status 
Lists the status of the DSL link 

25 
Field 
Description 
Link Power State 
Link output power state. 
Line Coding (Trellis) 
Trellis On/Off 
SNR Margin (0.1 dB) 
Signal to Noise Ratio (SNR) margin 
Attenuation (0.1 dB) Estimate of average loop attenuation in the downstream 
direction. 
Output Power  
(0.1 dBm) 
Total upstream output power 
Attainable Rate (Kbps) 
The sync rate you would obtain. 
Rate (Kbps) 
Current sync rates downstream/upstream  
In VDSL mode, the following section is inserted. 
B 
Number of bytes in Mux Data Frame 
M 
Number of Mux Data Frames in a RS codeword 
T  
Number of Mux Data Frames in an OH sub-frame 
R  
Number of redundancy bytes in the RS codeword 
S  
Number of data symbols the RS codeword spans 
L  
Number of bits transmitted in each data symbol 
D  
The interleaver depth 
I 
The interleaver block size in bytes 
N 
RS codeword size 
Delay  
The delay in milliseconds (msec) 
INP 
DMT symbol 
OH Frames 
Total number of OH frames 
OH Frame Errors 
Number of OH frames received with errors 
RS Words 
Total number of Reed-Solomon code errors 
RS Correctable Errors 
Total Number of RS with correctable errors 
RS Uncorrectable 
Errors  
Total Number of RS words with uncorrectable errors 
HEC Errors 
Total Number of Header Error Checksum errors 
OCD Errors 
Total Number of Out-of-Cell Delineation errors 
LCD Errors 
Total number of Loss of Cell Delineation 
Total Cells 
Total number of ATM cells (including idle + data cells) 
Data Cells 
Total number of ATM data cells 
Bit Errors 
Total number of bit errors 
Total ES 
Total Number of Errored Seconds 
Total SES 
Total Number of Severely Errored Seconds  
Total UAS 
Total Number of Unavailable Seconds 

26 
xDSL BER TEST 
Click xDSL BER Test on the xDSL Statistics screen to test the Bit Error Rate (BER). 
A small pop-up window will open after the button is pressed, as shown below. 
Click Start to start the test or click Close to cancel the test. After the BER testing is 
complete, the pop-up window will display as follows.  

27 
xDSL TONE GRAPH 
Click Draw Tone Graph on the xDSL Statistics screen and a pop-up window will 
display the xDSL bits per tone status, as shown below. 

28 
4.3 Route 
Choose Route to display the routes that the NexusLink 3112u has found.  
Field 
Description 
Destination 
Destination network or destination host 
Gateway 
Next hop IP address 
Subnet Mask 
Subnet Mask of Destination 
Flag 
U: route is up 
 !: reject route 
G: use gateway 
H: target is a host 
R: reinstate route for dynamic routing 
D: dynamically installed by daemon or redirect 
M: modified from routing daemon or redirect 
Metric 
The 'distance' to the target (usually counted in hops).  It is not 
used by recent kernels, but may be needed by routing daemons. 
Service 
Shows the WAN connection label 
Interface 
Shows connection interfaces 

29 
4.4 ARP 
Click ARP to display the ARP information. 
Field 
Description 
IP address 
Shows IP address of host pc 
Flags 
Complete, Incomplete, Permanent, or Publish 
HW Address 
Shows the MAC address of host pc 
Device 
Shows the connection interface   
4.5 DHCP 
Click DHCP to display all DHCP Leases. 
Field 
Description 
IPv6 Address 
Shows IP address of device/host/PC 
MAC Address 
Shows the Ethernet MAC address of the device/host/PC 
IP Address 
Shows IP address of device/host/PC 
Expires In 
Shows how much time is left for each DHCP Lease 

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Field 
Description 
IPv6 Address 
Shows IP address of device/host/PC 
MAC Address 
Shows the Ethernet MAC address of the device/host/PC 
Duration 
Shows leased time in hours 
Expires In 
Shows how much time is left for each DHCP Lease 

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4.6 NAT Session 
Click the “Show All” button to display the following. 
Field 
Description 
Source IP    
The source IP from which the NAT session is established  
Source Port    
The source port from which the NAT session is established  
Destination IP    
The IP which the NAT session was connected to 
Destination Port   
The port which the NAT session was connected to 
Protocol   
The Protocol used in establishing the particular NAT session 
Timeout 
The time remaining for the TCP/UDP connection to be active 

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4.7 IGMP Proxy 
Field 
Description 
Interface 
The Source interface from which the IGMP report was received 
WAN 
The WAN interface from which the multicast traffic is received 
Groups 
The destination IGMP group address 
Member 
The Source IP from which the IGMP report was received 
Timeout 
The time remaining before the IGMP report expires 

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4.8 IPv6 
4.8.1 IPv6 Info 
Field 
Description 
Interface  
WAN interface with IPv6 enabled 
Status  
Connection status of the WAN interface 
Address  
IPv6 Address of the WAN interface 
Prefix  
Prefix received/configured on the WAN interface 
Device Link-local Address  
The CPE's LAN Address 
Default IPv6 Gateway  
The default WAN IPv6 gateway 
IPv6 DNS Server 
The IPv6 DNS servers received from the WAN interface 
/ configured manually 

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4.8.2 IPv6 Neighbor 
Field 
Description 
IPv6 Address 
Ipv6 address of the device(s) found 
Flags 
Status of the neighbor device 
HW Address 
MAC address of the neighbor device 
Device 
Interface from which the device is located 

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4.8.3 IPv6 Route 
Field 
Description 
Destination 
Destination IP Address 
Gateway 
Gateway address used for destination IP 
Metric 
Metric specified for gateway 
Interface 
Interface used for destination IP 

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4.9 Network Map 
The network map feature provides an illustration of connected devices 
on the router. 
The current wan status (firewall on/off) is displayed on the left side. 
Detailed information of PC/USB connected to the router is shown on 
the right side.   

37 
4.10 Wireless 
4.10.1 Station Info 
This page shows authenticated wireless stations and their status. Click the Refresh 
button to update the list of stations in the WLAN. 
Consult the table below for descriptions of each column heading. 
Field 
Description 
MAC 
Lists the MAC address of all the stations. 
Associated 
Lists all the stations that are associated with the Access 
Point, along with the amount of time since packets were 
transferred to and from each sta
tion. If a station is idle for 
too long, it is removed from this list. 
Authorized 
Lists those devices with authorized access. 
SSID 
Lists which SSID of the modem that the stations connect 
to. 
Interface 
Lists which interface of the modem that the stations 
connect to. 

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4.10.2 Site Survey 
The graph displays wireless APs found in your neighborhood by channel. 

39 
Chapter 5 Basic Setup 
You can reach this page by clicking on the following icon located at the top of the 
screen. 
This will bring you to the following screen. 

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5.1 Wan Setup 
Add or remove ATM, PTM and ETH WAN interface connections here.  
Click Add to create a new ATM interface (see Appendix E - Connection Setup). 
NOTE: Up to 8 ATM interfaces can be created and saved in flash memory. 
To remove a connection, select its Remove column radio button and click Remove. 

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5.1.1 WAN Service Setup 
This screen allows for the configuration of WAN interfaces. 
Click the Add button to create a new connection. For connections on ATM or ETH 
WAN interfaces see Appendix E - Connection Setup.  
To remove a connection, select its Remove column radio button and click Remove. 
Heading 
Description 
Interface  
Name of the interface for WAN 
Description 
Name of the WAN connection 
Type 
Shows the connection type  
Vlan8021p 
VLAN ID is used for VLAN Tagging (IEEE 802.1Q) 
VlanMuxId 
Shows 802.1Q VLAN ID 
IGMP 
Shows Internet Group Management Protocol (IGMP) status 
NAT 
Shows Network Address Translation (NAT) status 
Firewall 
Shows the Security status 
IPv6 
Shows the WAN IPv6 address 
MLD 
Shows Multicast Listener Discovery (MLD) status 
Remove 
Select interfaces to remove 
To remove a connection, select its Remove column radio button and click Remove. 
NOTE:  ETH and ATM service connections cannot coexist. In Default Mode, up to 
8 WAN connections can be configured; while VLAN Mux Connection Mode 
supports up to 16 WAN connections. 
NOTE: Up to 16 PVC profiles can be configured and saved in flash memory.  
Also, ETH and PTM/ATM service connections cannot coexist. 

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5.2 NAT 
To display this option, NAT must be enabled in at least one PVC. NAT is not an 
available option in Bridge mode. 
5.2.1 Virtual Servers 
Virtual Servers allow you to direct incoming traffic from the WAN side (identified by 
Protocol and External port) to the internal server with private IP addresses on the 
LAN side. The Internal port is required only if the external port needs to be 
converted to a different port number used by the server on the LAN side.  
A maximum of 32 entries can be configured. 
To add a Virtual Server, click Add. The following will be displayed. 

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Consult the table below for field and header descriptions. 
Field/Header 
Description 
Choose All Interface Virtual server rules will be created for all WAN interfaces. 
Choose One Interface 
Use Interface 
Select a WAN interface from the drop-down box. 
Select a Service 
Or  
Custom Service 
User should select the service from the list. 
Or 
User can enter the name of their choice. 
Server IP Address 
Enter the IP address for the server. 
Enable NAT Loopback 
Allows local machines to access virtual server via WAN IP 
Address 
External Port Start 
Enter the starting external port number (when you select 
Custom Server). When a service is selected, the port 
ranges are automatically configured. 
External Port End 
Enter the ending external port number (when you select 
Custom Server). When a service is selected, the port 
ranges are automatically configured. 
Protocol 
TCP, TCP/UDP, or UDP. 
Internal Port Start 
Enter the internal port starting number (when you select 
Custom Server). When a service is selected the port ranges 
are automatically configured 
Internal Port End 
Enter the internal port ending number (when you select 
Custom Server). When a service is selected, the port 
ranges are automatically configured. 

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5.2.2 Port Triggering 
Some applications require that specific ports in the firewall be opened for access by 
the remote parties.  Port Triggers dynamically 'Open Ports' in the firewall when an 
application on the LAN initiates a TCP/UDP connection to a remote party using the 
'Triggering Ports'.  The Router allows the remote party from the WAN side to 
establish new connections back to the application on the LAN side using the 'Open 
Ports'.  A maximum 32 entries can be configured. 
To add a Trigger Port, click Add. The following will be displayed. 
Click Save/Apply to save and apply the settings. 
Consult the table below for field and header descriptions. 

45 
Field/Header 
Description 
Use Interface 
Select a WAN interface from the drop-down box. 
Select an Application 
Or  
Custom Application 
User should select the application from the list. 
Or  
User can enter the name of their choice. 
Trigger Port Start 
Enter the starting trigger port number (when you select 
custom application).   When an application is selected, the 
port ranges are automatically configured. 
Trigger Port End 
Enter the ending trigger port number (when you select 
custom application).   When an application is selected, the 
port ranges are automatically configured. 
Trigger Protocol 
TCP, TCP/UDP, or UDP. 
Open Port Start 
Enter the starting open port number (when you select 
custom application).   When an application is selected, the 
port ranges are automatically configured. 
Open Port End 
Enter the ending open port number (when you select 
custom application).   When an application is selected, the 
port ranges are automatically configured. 
Open Protocol 
TCP, TCP/UDP, or UDP. 

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5.2.3 DMZ Host 
The DSL router will forward IP packets from the WAN that do not belong to any of 
the applications configured in the Virtual Servers table to the DMZ host computer. 
To Activate the DMZ host, enter the DMZ host IP address and click Save/Apply. 
To Deactivate the DMZ host, clear the IP address field and click Save/Apply. 
Enable NAT Loopback allows PC on the LAN side to access servers in the LAN 
network via the router’s WAN IP. 

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5.2.4 IP Address Map 
Mapping Local IP (LAN IP) to some specified Public IP (WAN IP). 
Field/Header 
Description 
Rule 
The number of the rule 
Type 
Mapping type from local to public. 
Local Start IP 
The beginning of the local IP 
Local End IP 
The ending of the local IP 
Public Start IP 
The beginning of the public IP 
Public End IP 
The ending of the public IP 
Remove 
Remove this rule 
Click the Add button to display the following. 
Select a Service, then click the Save/Apply button. 
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One to One: mapping one local IP to a specific public IP 
Many to one: mapping a range of local IP to a specific public IP 
Many to many(Overload): mapping a range of local IP to a different range of 
public IP 
Many to many(No Overload): mapping a range of local IP to a same range of 
public IP 

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5.2.5  IPSEC ALG 
IPSEC ALG provides multiple VPN passthrough connection support, allowing 
different clients on LAN side to establish a secured IP Connection to the WAN server. 
To enable IPSEC ALG, tick the checkbox and click the Save button. 

50 
5.2.6  SIP ALG 
This page allows you to enable / disable SIP ALG. 

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5.3 LAN 
Configure the LAN interface settings and then click Apply/Save. 
Consult the field descriptions below for more details. 
GroupName: Select an Interface Group. 
1st LAN INTERFACE 
IP Address: Enter the IP address for the LAN port. 
Subnet Mask: Enter the subnet mask for the LAN port. 
IGMP Snooping:    
   Standard Mode:  In standard mode, multicast traffic will flood to all  
    bridge ports when no client subscribes to a multicast  
    group – even if IGMP snooping is enabled. 

52 
    Blocking Mode:  In blocking mode, the multicast data traffic will be  
    blocked and not flood to all bridge ports when there are 
    no client subscriptions to any multicast group. 
Enable Enhanced IGMP: Enable by ticking the checkbox . IGMP packets 
between LAN ports will be blocked. 
Enable LAN side firewall: Enable by ticking the checkbox . 
DHCP Server:  To enable DHCP, select Enable DHCP server and enter Start and 
End IP addresses and the Leased Time. This setting configures the 
router to automatically assign IP, default gateway and DNS server 
addresses to every PC on your LAN. 
Setting TFTP Server: Enable by ticking the checkbox . Then, input the TFTP    
                        server address or an IP address. 
Static IP Lease List:  A maximum of 32 entries can be configured. 
To add an entry, enter MAC address and Static IP address and then click      
Apply/Save. 
To remove an entry, tick the corresponding checkbox  in the Remove column and 
then click the Remove Entries button, as shown below. 

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2ND LAN INTERFACE 
To configure a secondary IP address, tick the checkbox  outlined (in RED) below. 
IP Address: Enter the secondary IP address for the LAN port. 
Subnet Mask: Enter the secondary subnet mask for the LAN port. 
Ethernet Media Type: 
Configure auto negotiation, or enforce selected speed and duplex mode for the 
Ethernet ports. 

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5.3.1 LAN IPv6 Autoconfig 
Configure the LAN interface settings and then click Save/Apply. 
Consult the field descriptions below for more details. 

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LAN IPv6 Link-Local Address Configuration 
Heading 
Description 
EUI-64 
Use EUI-64 algorithm to calculate link-local address from MAC 
address 
User Setting 
Use the Interface Identifier field to define a link-local address 
Static LAN IPv6 Address Configuration 
Heading 
Description 
Interface Address  
(prefix length is 
required): 
Configure static LAN IPv6 address and subnet prefix 
length 
IPv6 LAN Applications 
Heading 
Description 
Stateless 
Use stateless configuration 
Refresh Time (sec): 
The information refresh time option specifies how long a 
client should wait before refreshing information retrieved 
from DHCPv6 
Stateful 
Use stateful configuration 
 Start interface ID: 
Start of interface ID to be assigned to dhcpv6 client 
 End interface ID: End of interface ID to be assigned to dhcpv6 client
 Leased Time (hour): 
Lease time for dhcpv6 client to use the assigned IP address 
Static IP Lease List:  A maximum of 32 entries can be configured. 
To add an entry, enter MAC address and Interface ID and then click Apply/Save. 

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To remove an entry, tick the corresponding checkbox  in the Remove column and 
then click the Remove Entries button, as shown below. 
Heading 
Description 
Enable RADVD 
Enable use of router advertisement daemon 
RA interval Min(sec): 
Minimum time to send router advertisement 
RA interval Max(sec): Maximum time to send router advertisement
Reachable Time(ms): 
The time, in milliseconds that a neighbor is 
reachable after receiving reachability 
confirmation 
Default Preference: 
Preference level associated with the default 
router 
MTU (bytes): 
MTU value used in router advertisement 
messages to insure that all nodes on a link use 
the same MTU value 
Enable Prefix Length Relay  
Use prefix length receive from WAN interface 
Enable Configuration Mode 
Manually configure prefix, prefix length, 
preferred lifetime and valid lifetime used in 
router advertisement 
Enable ULA Prefix Advertisement 
Allow RADVD to advertise Unique Local Address 
Prefix 
Randomly Generate 
Use a Randomly Generated Prefix 
Statically Configure Prefix 
Specify the prefix to be used 
Statically Configure 
The prefix to be used 
 Preferred Life Time (hour) 
The preferred life time for this prefix 
 Valid Life Time (hour) 
The valid life time for this prefix 
Enable MLD Snooping 
Enable/disable IPv6 multicast forward to LAN 
ports 

57 
5.3.2 Static IP Neighbor 
Click the Add button to display the following. 
Click Apply/Save to apply and save the settings. 
Heading 
Description 
IP Version 
The IP version used for the neighbor device 
IP Address 
Define the IP Address for the neighbor device 
MAC Address 
The MAC Address of the neighbor device 
Associated Interface 
The interface where the neighbor device is located 

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5.3.3 UPnP 
Select the checkbox  provided and click Apply/Save to enable UPnP protocol. 

59 
5.4 Wireless 
5.4.1 Basic 
The Basic option allows you to configure basic features of the wireless LAN interface. 
Among other things, you can enable or disable the wireless LAN interface, hide the 
network from active scans, set the wireless network name (also known as SSID) 
and restrict the channel set based on country requirements. 
Click Apply/Save to apply the selected wireless options. 
Consult the table below for descriptions of these options. 
Option 
Description 
Enable 
Wireless 
A checkbox 
 that enables or disables the wireless LAN interface.  
When selected, a set of basic wireless options will appear. 

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Option 
Description 
Hide Access 
Point 
Select Hide Access Point to protect the access point from detection 
by wireless active scans. To check AP status in Windows XP, open 
Network Connections from the start Menu and select View 
Available Network Connections. If the access point is hidden, it 
will not be listed there. To connect a client to a hidden access point, 
the station must add the access point manually to its wireless 
configuration.   
Clients 
Isolation 
When enabled, it prevents client PCs from seeing one another in My 
Network Places or Network Neighborhood. Also, prevents one 
wireless client communicating with another wireless client. 
Disable WMM 
Advertise 
Stops the router from ‘advertising’ its Wireless Multimedia (WMM) 
functionality, which provides basic quality of service for 
time-sensitive applications (e.g. VoIP, Video). 
Enable 
Wireless 
Multicast 
Forwarding 
Select the checkbox 
 to enable this function. 
Enable WiFi 
Button 
Select the checkbox 
 to enable the WiFi button. 
SSID 
[1-32 
characters] 
Sets the wireless network name. SSID stands for Service Set 
Identifier. All stations must be configured with the correct SSID to 
access the WLAN. If the SSID does not match, that user will not be 
granted access.   
BSSID 
The BSSID is a 48-bit identity used to identify a particular BSS 
(Basic Service Set) within an area.  In Infrastructure BSS 
networks, the BSSID is the MAC (Media Access Control) address of 
the AP (Access Point); and in Independent BSS or ad hoc networks, 
the BSSID is generated randomly. 
Country 
A drop-down menu that permits worldwide and specific national 
settings.  Local regulations limit channel range:  
US= worldwide, Japan=1-14, Jordan= 10-13, Israel= 1-13 
Max Clients 
The maximum number of clients that can access the router. 
Wireless - 
Guest / 
Virtual 
Access Points 
This router supports multiple SSIDs called Guest SSIDs or Virtual 
Access Points. To enable one or more Guest SSIDs select the 
checkboxes  in the Enabled 
column. To hide a Guest SSID select 
its checkbox  in the Hidden column.   
Do the same for Isolate Clients and Disable WMM Advertise.  
For a description of these two functions, see the previous entries for 
“Clients Isolation” and “Disable WMM Advertise”. Similarly, for 
Enable WMF, Max Clients and BSSID, consult the matching 
entries in this table. 
NOTE: Remote wireless hosts cannot scan Guest SSIDs. 

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5.4.2 Security 
The following screen appears when Wireless Security is selected. The options shown 
here allow you to configure security features of the wireless LAN interface. 
Click Apply/Save to implement new configuration settings. 
WIRELESS SECURITY 
Setup requires that the user configure these settings using the Web User Interface 
(see the table below). 
Select SSID 
Select the wireless network name from the drop-down box. SSID stands for Service 
Set Identifier.  All stations must be configured with the correct SSID to access the 
WLAN. If the SSID does not match, that client will not be granted access. 
Network Authentication 
This option specifies whether a network key is used for authentication to the 
wireless network.  If network authentication is set to Open, then no authentication 
is provided.  Despite this, the identity of the client is still verified.   
Each authentication type has its own settings.  For example, selecting 802.1X 
authentication will reveal the RADIUS Server IP address, Port and Key fields.  WEP 
Encryption will also be enabled as shown below. 
The settings for WPA authentication are shown below. 

62 
The settings for WPA-PSK authentication are shown next. 
WEP Encryption 
This option specifies whether data sent over the network is encrypted. The same 
network key is used for data encryption and network authent
ication. Four network 
keys can be defined although only one can be used at any one time. Use the Current 
Network Key list box to select the appropriate network key.  
Security options include authentication and encryption services based on the wired 
equivalent privacy (WEP) algorithm.  WEP is a set of security services used to 
protect 802.11 networks from unauthorized access, such as eavesdropping; in this 
case, the capture of wireless network traffic.   
When data encryption is enabled, secret shared encryp
tion keys are generated and 
used by the source station and the destination station to alter frame bits, thus 
avoiding disclosure to eavesdroppers. 
Under shared key authentication, each wireless station is assumed to have received 
a secret shared key over a secure channel that is independent from the 802.11 
wireless network communications channel. 
Encryption Strength 
This drop-down list box will display when WEP Encryption is enabled.  The key 
strength is proportional to the number of binary bits comprising the key.  This 
means that keys with a greater number of bits have a greater degree of security and 
are considerably more difficult to crack.  Encryption strength can be set to either 
64-bit or 128-bit.  A 64-bit key is equivalent to 5 ASCII characters or 10 

63 
hexadecimal numbers.  A 128-bit key contains 13 ASCII characters or 26 
hexadecimal numbers.  Each key contains a 24-bit header (an initiation vector) 
which enables parallel decoding of multiple streams of encrypted data. 
Please see 6.13 for MAC Filter, Wireless Bridge and Advanced Wireless features.