Nortel Networks BCM1000 - Manual (Page 235)

Chapter 15 Troubleshooting 235
Installation and Maintenance Guide
If the emergency telephone is connected to the CTM, use the following procedure:
1 Check that the system has a CTM installed.
2 Check that there is no dial tone at the emergency telephone.
3 Replace the CTM.
ATA 2 does not function
If the Business Communications Manager ATA 2 does not function. Follow these steps to
troubleshoot the problem.
1 Make sure there is ac power connected to the ATA 2 unit.
2 Make sure that ATA 2 is in the Tones OFF mode. (For Data Applications only.)
3 Correctly configure the ATA 2 telephone port for data communication.
4 Allow sufficient start up time.
5 Assign the prime line.
6 Assign 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.