Checking Ata2 Wiring; Bcm450 System Reset - Nortel Business Communications Manager 450 Installation Manual

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Checking ATA2 wiring

If the problem with the ATA2 persists, use the following procedure to check the
wiring.
Step
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BCM450 system reset

This section describes how to reset the BCM450 system using the reset
switch. When the BCM450 is in this condition, you can make further
modifications. After you reboot the BCM450, PC and SSH users will have
access to Maintenance CLI.
See the following figure for the location of the reset switch.
Copyright © 2006-2009 Nortel Networks
If you hear no dial tone at the ATA2 unit disconnect the line side of the ATA2.
Connect a digital telephone to the ATA2 port.
Check that the connection from the ATA2 to the BCM450 hardware works
correctly.
Action
Use an analog phone to test the ATA2.
Check the connection from the ATA2 to the terminal. The resistance must be
200 ohms or less for data applications and 1300 ohms or less for voice
applications.
Check the connection from the BCM450 hardware to the ATA2.
Check that the connection from the ATA2 to the BCM450 hardware works
correctly. The wiring must be equivalent to 800 m of 0.5 mm wire (2600 ft. of
24-AWG) or less. Do not use bridge taps and loading coils between the
BCM450 hardware and ATA2.
Nortel Business Communications Manager 450 1.0
Installation — System
NN40160-301 01.04 Standard
July 2009
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Troubleshooting 101