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TONE-BD (Tone-Clock Circuit)
Issue 1 June 2005 2339
Port Networks with a Single Tone-Clock
Circuit Pack
This procedure is destructive.
1. Pull out the defective IPSI or Tone-Clock circuit pack. This will remove the clocks and cause
the system to activate emergency measures. If this is an IPSI supported port network, use
busyout ipserver-interface:
● All calls to and from the PN will drop, and the PN will activate Emergency Transfer within
about one minute. But the rest of the system should operate normally.
2. Insert a new IPSI or Tone-Clock circuit pack. The system will detect the return of the clocks
and will automatically recover as follows:
● The system will reset the PN (PN cold restart), and all of the PN’s red LEDs will come on
and go off within 30 seconds.
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 6. Otherwise, there
may be a problem with the TDM bus; possibly a bent pin in the IPSI or Tone-Clock circuit
pack’s 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:
● Restart the PN by resetting its Expansion Interface circuit pack using reset
port-network P level 2, using the port network’s number of the affected PN. (Use
the list cabinet C command to determine the port network’s number for a given
cabinet and carrier.)
6. Test the new IPSI or Tone-Clock circuit pack to verify that it is functioning properly, using
test tone-clock location long, 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.
Port Networks with Two Tone-Clock
Circuit Packs
Notes:
1. Use list cabinet C to determine the port network’s number of the cabinet and carrier
containing the Tone-Clock circuit pack to be replaced. If both of a PN’s Tone-Clock circuit
packs need to be replaced, first replace and test the one in standby mode by either:
● Entering status port-network to display its status
● Making sure its amber LED is off
Make sure it is healthy and active before replacing the second one.