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Communication Manager Maintenance-Object Repair Procedures
2342 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Table 837: LED Condition/Tone-Clock Circuit States
Condition Tone-Clock
Circuit State
Explanation
Flashing yellow
2.7 seconds on
0.3 seconds off
Active An external timing source is being used as
a synchronization reference
1
.
1. For a Tone-Clock in the master PN, the external source is a primary or secondary DS1 source, or a
Stratum-3 clock. For a Tone-Clock in a slave PN, the external source is the Expansion Interface circuit
pack.
Flashing yellow
0.3 seconds on
2.7 seconds off
Active The local oscillator on the IPSI or
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.
S8700 MC:
yellow
LED off
Standby The circuit pack is in standby mode,
(neither generating tones nor supplying
clocks).
S8700 MC:
“Jingle bells”
green and yellow
0.1 sec on, 0.2 sec off,
0.1 sec on, 0.4 sec off,
0.4 sec on, 0.4 sec off
Standby Maintenance software is testing the
standby circuit pack (the standby
Tone-Clock is providing tones).
Double blink
yellow
0.3 sec on, 0.3 sec off,
0.3 sec on, 2.4 sec off,
Active TN2312 or 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.
S8700 MC:
random yellow
Standby If the circuit pack is a TN2182, the amber
LED may come on and off intermittently as
ETR-PTs on the board are used for
tone-detection services.