Nortel Networks BCM1000 manual ATA 2 does not function, Checking the wiring

Chapter 14 Troubleshooting 165

If the emergency telephone is connected to the CTM, use the following procedure:

1Check that the system has a CTM installed.

2Check that there is no dial tone at the emergency telephone.

3Replace the CTM.

ATA 2 does not function

If the Business Communications Manager ATA 2 does not function. Follow these steps to troubleshoot the problem.

1Make sure there is ac power connected to the ATA 2 unit.

2Make sure that ATA 2 is in the Tones OFF mode. (For Data Applications only.)

3Correctly configure the ATA 2 telephone port for data communication.

4Allow sufficient start up time.

5Assign the prime line.

6Assign a ringing line if required, for example, auto-answer modems, FAX).

Checking the wiring

Check the following connections:

•ATA 2 to the terminal.

The resistance must be 200 ohms or less for data applications and 1,300 ohms or less for voice applications.

•Business Communications Manager hardware to ATA 2.

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 Business Communications Manager hardware and Business Communications Manager ATA 2.

•External line to the Business Communications Manager system.

Ensure the external line is correctly connected to the BCM1000 and make sure there is dial tone.

Installation and Maintenance Guide