Lucent Technologies Release 7 Manuel D’Utilisation

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DEFINITY Enterprise Communications Server Release 7 
Maintenance for R7r  
555-230-126  
Issue 4
June 1999
Maintenance Object Repair Procedures 
9-1539
STRAT-3 (Stratum 3 Clock) 
9
The output of the CI and PAI cards go directly to the TN780 Tone-Clock circuit 
pack via two 25-pair amphenol-terminated cables. All of the cards have red 
and/or green LEDs for providing status or alarm indications. The abbreviations 
used in the table are defined above except for SRC (source) and PLL (Phase 
Locked Loop).
Table 9-585.
Stratum 3 Clock LED Indications
Card
Name
Color
Indication
PAI
REF A
Red
Loss of input reference A or CI A failed
REF B
Red
Loss of input reference B or CI A failed
ST A
Red
Failed Stratum 3 clock A
ST B
Red
Failed Stratum 3 clock B
PWR A
Green
-48VDC A present
PWR B
Green
-48VDC B present
CI
FAIL
Red
Card failure
DS1
Green
DS1 source present
CC
Green
Composite clock source
1
 present
1.
Composite Clock (CC) source refers to the protocol used to electrically transfer timing from the
Stratum 3 clock to the switch. The Composite Clock source is not relevant to the system.
SRC ACTIVE
Green
Card is currently on-line
ST3
FAIL
Red
Card failure
LOCK
Red
PLL lost sync with reference or holdover mode
REF A
Red
Timing Reference from CI A
REF B
Red
Timing Reference from CI B
TOC
FAIL
Red
Card failure
PORT ALM
Red
Output port alarm (one or more)
ST
Green
Reference present from ST clock
INPUT
Green
Reference present from CI
500’
Green
500 feet phase advance
1000’
Green
1000 feet phase advance