Conti vit y 251 ABOT D eployment
Version 1. 0
April 26, 2004
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LLC-based Multiplexing
LLC-based multiplexing is the default factory setting and carries multiple protocols over one VC,
and it is used by most ISPs.
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VPI and VCI
The default factory setting of VPI/VCI is 0/35. Be sure to use the correct Virtual Path Identifier
(VPI) and Virtual Channel Identifier (VCI) numbers assigned to you.
2.11.1 Reset to factory default
It is important to make sure that your C251 is in factory default setting before starting
configurations, since the method is based on the assumption that your c251 is configured with
default factory setting. If you are not sure, use the following ways to reset it.
2.11.2 Using the Reset Button
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Make sure the SYS LED is on (not blinking).
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Press the RESET button for about five seconds, and then release it. The SYS LED
begins to blink, and then reboot. The defaults factory setting is restored when the
Contivity 251 boots up.
2.11.3 Uploading a Configuration File via Console Port
Download the default configuration file from http://www.nortelnetworks.com/index.html, unzip it
and save it in a folder.
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Turn off the Contivity 251, begin a terminal emulation software session and turn on the
Contivity 251 again. When you see the message "Press Any key to enter Debug Mode
within 3 seconds", press any key to enter debug mode.
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Enter "atlc" after "Enter Debug Mode" message.
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Wait for "Starting XMODEM upload" message before activating Xmodem upload on your
terminal. This is an example Xmodem configuration upload using HyperTerminal.
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Click Transfer, then Send File to display the following screen.
2.12 Provide End-Users with Instructions
Provide the remote end-users with very simple instructions for how establishing the initial
connection, and distribute the instructions by FAX, phone, or mail.
The instructions for setting up the C251 Client should contain the following minimum information:
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ISP VPI/VCI numbers and how to configure
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How to configure Client Emulation
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Username (configured in gateway user-group)
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Password (pre-shared key)
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CO gateway IP address
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Press “Connect” button to start Client connection
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How to use PING command for validation test.
Add additional information for scheduling and contact numbers. The end users should have
Contivity 251 Quick Start Guide shipped to them for references.