DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1778TONE-BD (Tone-Clock Circuit Pack)
9
TONE-BD (Tone-Clock Circuit Pack)
The Tone-Clock circuit packs house two indep endent components. The tone
generator provides all the tones nee ded by the system, and the c lock generates
the system clocks for the Time Division Multip lex (TDM) Bus and the LAN Bus,
and aids in monitoring and selecting internal sync hronization references.
When resolving errors/alarms on the Tone-Clock circuit pac k, the following
sections should also be c onsulted:
■Use the set tone-clock PC command to establish th e tone and
synchronization resources for the system.
■TONE-PT (Tone Generator)
■TDM-CLK (TDM Bus Clock)
■SYNC (Synchronization)
The TN2182 is a combined Tone-Clock-Detector circ uit pack which contains a
third independe nt function not available on the TN768 or TN780. The TN2182
contains 8 ports used for all-purpose tone detec tion. These ports are called
Enhanced Tone Receiver ports (ETR-PT) and are described in the documentation
for ETR-PT.

Tone-Clock Circuit Packs and System

Reliability Options

The following sections desc ribe the relationship between the various System
Reliability Options and Tone-Clock circuit p ack configurations.

Standard Reliability Option

Systems with the Standard Reliability Option (no d uplication options) ha ve one
Tone-Clock circuit pack in each p ort network (PPN and EPN). For the PPN or the
first EPN of a cabinet this is in the A carrier. Cab inets containing a second EPN
MO Name (in
Alarm Log) Alarm Level Initial Command to Run1
1. UU is the universal cabinet number (1 for PPN, 2 -44 for EPNs). C is the carrier designation (A,
B, C, D, or E).
Full Name of MO
TONE-BD MAJOR test tone-clock UUC short Tone-Clock Circuit Pack
TONE-BD MINOR test tone-clock UUC s hort Tone-Clock Circuit Pack
TONE-BD WARNING release tone-cloc k UUC Tone-Clock Circuit Pack