Nortel Networks BCM200/400 - Manual (Page 236)

236 Chapter 19 System monitoring and troubleshooting
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5 Assign the prime line.
6 Assign a ringing line if required. For example, auto-answer modems and fax machines require
a ringing line.
To check the ATA 2 wiring
1 ATA2 to the terminal. The resistance must be 200 ohms or less for data applications and
1,300 ohms or less for voice applications.
2 BCM system to ATA2. The wiring must be equivalent to 800 m of 0.5 mm wire (2,600 ft. of 24
AWG) or less. Do not use bridge taps and loading coils between the BCM system and ATA2.
3 External line to the BCM system. Ensure the external line is correctly connected to the BCM
system and make sure there is dial tone.
To check for dial tone at the ATA 2
1 If there is no dial tone, replace an analog telephone for the data communication device.
2 If there is no dial tone at the ATA2 unit:
a Disconnect the line side of ATA2. Connect a BCM telephone to the ATA2 port.
b Check that the connection from ATA2 to the BCM system is functioning correctly (the
telephone has dial tone).
To check for trunk line dial tone to the ATA 2
1 Disconnect the ATA2 external line from the BCM system and connect the data device directly
to this external line.
2 Make a call.
3 If the problem continues, the device or the external line is possibly at fault.
4 Plug the device into a different line.
5 If the problem continues, the device is possibly at fault.
For more information about ATA2, contact your customer service representative.