Avaya DEFINITY Server CSI Maintenance Manual page 1719

TONE-BD (Tone-Clock Circuit Pack)
How to Replace a Tone-Clock Circuit Pack
Replacing the Tone-Clock circuit pack is a service-disrupting procedure on Port
Networks, because the Tone-Clock circuit pack is always needed to generate
clocks for its network. When the circuit pack is removed, all calls are dropped
immediately. However, if the Tone-Clock is removed for replacement, the System
Emergency Transfer feature is activated within milliseconds, and the entire
system is disrupted; no calls can be placed, and existing calls are dropped.
When replacing the Tone-Clock circuit pack, always replace it with a TN2182
Tone-Clock circuit pack. The TN2182 may be used in all country configurations.
Port Networks with a Single Tone-Clock Circuit
Pack
This procedure is destructive.
1. Pull out the defective Tone-Clock circuit pack. This will remove the clocks
and cause the system to activate emergency measures:
2. Insert a new Tone-Clock circuit pack. The system will detect the return of
the clocks and will automatically recover as follows:
3. If the red LEDs come on but do not go off within 30 seconds, pull the circuit
pack out and reseat it. If the LEDs perform as expected this time, continue
with step 4. Otherwise, there may be a problem with the TDM bus; possibly
a bent pin in the Tone-Clock circuit pack slot. Follow the directions in the
TDM-BUS maintenance section.
4. If the red LEDs did light, as explained above, then go to Step 6. If the red
LEDs do NOT light, as explained above, then go on to Step 5.
5. Restart the affected Port Network:
6. Test the new Tone-Clock circuit pack to verify that it is functioning properly,
using the test tone-clock PC long command, and verify that the system is
operational by placing several phone calls. Where possible, try calls into,
out from, and within the affected Port Network.
555-233-119
The system will immediately go into the Emergency Transfer state.
The system will perform a reset system 2 (system cold 2 restart)
automatically. First, all red LEDs of the PPN will come on and off
within 30 seconds.
Restart the system via the reset system 2 command.
Issue 5 October 2002
1719