AT&T DS1/DMi/ISDN-PRI manual External-Clock Interface

SYNCHRONIZATION OF DIGITAL FACILITIES 5-17

COMPOSITE

CLOCK

OUTPUT #1

COMPOSITE

CLOCK

OUTPUT #2

COMPOSITE

CLOCK

CONVERTER

SYNC

CABLES

LOS

DETECTION

TN2131 CIRCUIT

ALARMS

SYNC

OUTPUT

PACK

NOTE 1

NOTE 2

NOTES:

1 . Alarm signals are cabled to the cross-connect field. For System 85 and Generic 2, they are then cross-connected and cabled back to the maintenance or CPE interface.

2.System 85 and Generic 2 applications require that the composite clock synchronization signal be connected to the module control or TMS carrier via an intercarrier cable. Traditional module control carriers (for both System 85 and Generic 2) use the H-600-260 group 1 cable, while Generic 2 universal module control carriers use the H-600-271 group 1 cable.

Figure 5-9.External-Clock Interface

Figure 5-10.External-Clock Duplicated Synchronization