User Guide

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1487TONE-BD (Tone-Clock Circuit Pack)
10
maintenance objects on the circuit pack. Flashing patterns of the yellow
and green LEDs correspond to the following service states: Tone-Clock
LED Flashing Codes
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 PC—where PC is the Standby Tone-Clock circuit
pack. Since the system is designed to operate primarily on the
preferred tone clock, the set tone-clock PC command should be
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-Clzteock in a slave port
network, the external source is the Expansion Interface circuit pack.
Condition
Tone-Clock
Circuit State Explanation
"flashing yellow" 2.7
seconds on, .3 seconds
off
active An external timing source is
being used as a synchronization
reference.
1
"flashing yellow" .3
seconds on, 2.7 seconds
off
active The local oscillator on the
Tone-Clock circuit pack is being
used as a synchronization
reference.
"yellow" on continuously active The circuit pack has been reset
but has not been told which
synchronization source to use.
"yellow" LED off standby The circuit pack is in standby
mode, (neither generating tones
nor supplying clocks).
"jingle bells" green and
yellow .1 sec on, .2 sec
off, .1 sec on, .4 sec off, .4
sec on, .4 sec off
standby Maintenance software is testing
the standby circuit pack (the
standby Tone-Clock is providing
tones).
"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.