Emergency Telephone Does Not Function; Ata 2 Does Not Function; Checking The Wiring - Nortel BCM50 Installation And Maintenance Manual

220

Emergency telephone does not function

2 Check that the switches on the media bay module are all set to on. Refer to
module switches" on page 110
If the media bay module is an ASM8, the switches on the right are not set to all on. Refer to
"Set the media bay module switches" on page 110
switches.
To check the media bay module switches, you must remove the media bay module from the
BCM50 Expansion Unit. Refer to
Emergency telephone does not function
If the emergency telephone is connected to the system, use the following procedure:
Check the power LED on the ASM 8 to check that the ASM 8 is receiving power.
1
Check that the emergency telephone has dial tone.
2
Check the external line and emergency telephone connections.
3
To avoid damage to the emergency telephone, connect the telephone directly to the external
4
line and check for dial tone.
Replace the MSC.
5

ATA 2 does not function

If the ATA 2 does not function. Follow these steps to troubleshoot the problem.
Make sure there is ac power connected to the ATA 2 unit.
1
Make sure that ATA 2 is in the Tones OFF mode. (For Data Applications only.)
2
Correctly configure the ATA 2 telephone port for data communication.
3
Allow sufficient start up time.
4
Assign the prime line.
5
Assign a ringing line if required, for example, auto-answer modems, fax).
6

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.
• BCM50 hardware to ATA 2.
Troubleshooting
for more information about these switches.
for information about setting these
"Replace a media bay module" on page 191
"Set the media bay
for instructions.