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 numb er of
the cabinet and c arrier containing the Tone-Clock circuit p ack to be
replaced. If both Tone-Clock circ uit packs in a Port Network need to b e
replaced, first replac e and test the one that is in standb y mode. Make sure
that it is healthy and active b efore replacing the second one. Make sure
the Tone-Clock circuit pack to b e replaced is in Standby Mod e 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 p ack may also be
determined by look ing at its LED. A continuously lit red LED on the
Tone-Clock circuit pack indic ates a reported fault on one or more of the
maintenance objects on the c ircuit pack. Flashing p atterns of the yellow
and green LEDs correspond to the following service states:
2. If the Tone-Clock circuit pack to b e replaced is activ e, 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 ac tive, 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 c arrier 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-Cloc k i n a slave p ort 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