DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1785TONE-BD (Tone-Clock Circuit Pack)
9
1. Use the
list cabinet
command to determine the Port Network number of
the cabinet and carrier containing the Tone-Clock circuit pack to be
replaced. If both Tone-Clock circuit packs in a Port Network need to be
replaced, first replace and test the one that is in standby mode. Make sure
that it is healthy and active before replacing the second one. Make sure
the Tone-Clock circuit pack to be replaced is in Standby Mode by
displaying its status via the
status port-network
command or making
sure its yellow LED is off.
The active/standby state of a Tone-Clock circuit pack may also be
determined by looking at its LED. A continuously lit red LED on the
Tone-Clock circuit pack indicates a reported fault on one or more of the
maintenance objects on the circuit pack. Flashing patterns of the yellow
and green LEDs correspond to the following service states:
2. If the Tone-Clock circuit pack to be replaced is active, then switch to the
other Tone-Clock circuit pack by doing the following:
■ set tone-clock UUC—Where UUC is the Standby Tone-Clock
circuit pack.
NOTE:
When Port Network Connectivity Duplication is active, the
system generally expects an EPN to have its "preferred"
Tone-Clock circuit pack active. For the first Port Network in a
given cabinet, this is carrier A. For a second PN in a given
"double blink"
yellow
.3 sec on, .3 sec off,
.3 sec on, 2.4 sec off,
active TN2182 has lost all external references and is in
holdover mode.
other green and
yellow patterns
active Maintenance software is testing the active circuit pack.
random yellow standby If the circuit pack is a TN2182, the yellow LED may
come on and off intermittently as ETR-PTs on the board
are used for tone detection services.
1. For a Tone-Clock in the master port network, the external source is the primary or secondary DS1
source, or a Stratum 3 clock. For a Tone-Clock in a slave port network, the external source is the
Expansion Interface circuit pack.
Table 9-667. LED Condition/Tone-Clock Circuit States
(Two Tone-Clock Pack) — Continued
Condition
Tone-Clock
Circuit State Explanation
Continued on next page
