DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-1539STRAT-3 (Stratum 3 Clock)
9
The output of the CI and PAI cards go direc tly to the TN780 Tone-Clock circuit
pack via two 25-pair amp henol-terminated cab les. All of the cards have red
and/or green LEDs for providing status or alarm indications. The abb reviations
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 sourc e1 present
1. Composite Clock (CC) source refers to the p rotoc ol 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