363-206-204
Equipment and Front Access Cable Installation
Issue 9 October 1998
3-19
TL1/X.25 Interface Cable Installation -
Front Access
Description
The TL1/X.25 interface is a message-based telemetry system. It is an alternative
to TBOS or parallel telemetry. The TL1/X.25 telemetry interfaces with a
maintenance center to provide DDM-2000 OC-3 system status information and
remote command capability.
NOTE
:
Parallel telemetry is not available in Release 13 software.
Procedure
The TL1/X.25 interface telemetry requires separate cable assembly connections
to each shelf in the bay.
The TL1/X.25 interface cable installation procedure for front access and rear
access is performed in the same manner with the exception that connection is
made to J245 of the front access TL1/X.25 cable previously installed, instead of
J45 on the backplane. Refer to the "TL1/X.25 Interface Cable Installation - Rear
Access" in the "Equipment and Rear Access Installation" section. The cables
should be routed out of the bay, stacking cables as shown in Figure 3-2.
Miscellaneous (Environmental) Discrete Telemetry
Cable Installation - Front Access
Description
Miscellaneous (environmental) discrete telemetry is the method to provide
environmental closures at the remote terminal for transmission to the central office
and interpretation at an operations system (OS) maintenance center.
The environmental control feature enables the maintenance center to remotely
initiate up to four contact closures at the remote terminal (RT) for equipment
operation such as pumps, generators, etc.
The environmental alarm status indications allow up to 14 (Releases 6 and 7) or
20 (Releases 8, 9, 11 and 13) miscellaneous user-settable alarm status
indications (SI) at the remote terminal for transmission toward the central office.
An additional external discrete (#15), dedicated for external power minor alarm
monitoring, is available (optional).
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