Nortel Networks BCM200/400 - Manual (Page 235)

Chapter 19 System monitoring and troubleshooting 235
BCM200/400 4.0 Installation and Maintenance Guide
BCM system does not function
The BCM system can experience a complete failure for any of the following reasons:
• Power supply failure
• Incorrect power supply connections
• AC power failure
Emergency telephone does not function
If the emergency telephone is connected to the system, refer to “To troubleshoot the emergency
telephone on the system” on page 235 .
If the emergency telephone is connected to the CTM, refer to “To troubleshoot the emergency
telephone connected to a CTM” on page 235 .
To troubleshoot the emergency telephone on the system
1 Check the Power LED on the ASM8 to check that the ASM8 is receiving power.
2 Check that the emergency telephone has dial tone.
3 Check the external line and emergency telephone connections.
4 To avoid damage to the emergency telephone, connect the telephone directly to the external
line and check for dial tone.
5 Replace the MSC.
To troubleshoot the emergency telephone connected to a CTM
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.
ATA2 does not function
If the BCM ATA2 does not function, use these procedures to troubleshoot the problem.
To troubleshoot the ATA2
1 Make sure there is AC power connected to the ATA2 unit.
2 Make sure that the ATA2 is in the tones off mode (for data applications only).
3 Correctly configure the ATA2 telephone port for data communication.
4 Allow sufficient start-up time.