Operations Interfaces
6-20 Issue 8.0 July 2002
The office alarms (OFFICE ALMS) interface is located on the interconnection
panel of the Low Speed Shelf - System Controller. Refer to Volume I, Section 3,
"Platform Descriptions," for more information about the physical location of the
office alarm interface.
Parallel Telemetry Interface 6
The parallel telemetry interface at an FT-2000 OC-48 Add/Drop-Rings Terminal
brings a minimum set of alarm information to an operations center. (The FT-2000
OC-48 Repeater Bay does not support a parallel telemetry interface.) Six alarm
closures show critical, major, and minor alarms for the local and remote terminals.
The appropriate contact is activated when an alarm condition is detected. In
Release 6 and later releases, the alarm closures also show critical, major, and
minor alarms for remote FT-2000 OC-48 Add/Drop-Rings Terminals and
DDM-2000 Multiplexers in the same alarm group within a subnetwork.
The parallel telemetry interface is designed for a maximum open circuit voltage of
60 V and a maximum current of 35 mA.
As with the user panel LEDs and office alarms, when multiple alarms are active,
the highest level parallel telemetry closure is activated. When the highest level
alarm clears, the parallel telemetry output "bumps down" to the next highest level
active alarm.
Since the parallel telemetry alarm closures reflect the office alarms, the alarm
delay and alarm clear parameters set for office alarms also apply to parallel
telemetry alarm closures.
The parallel telemetry (PAR TLM) interface is located on the interconnection
panel of the Low Speed Shelf - System Controller. Refer to Volume I, Section 3,
"Platform Descriptions," for more information about the physical location of the
parallel telemetry interface.
Refer to 824-102-148,
FT-2000 OC-48 Lightwave System, Operations Systems
Engineering Guide
, for detailed information about the parallel telemetry interface.
User-Settable Miscellaneous Discrete
Interface 6
The user-settable miscellaneous discrete interface allows an operations system
to monitor and control equipment collocated with the FT-2000 OC-48 Lightwave
System through a set of input and output contact closures. Sixteen environmental
inputs are provided to monitor environmental conditions (for example, open door,
high temperature, etc.). The FT-2000 OC-48 Add/Drop-Rings Terminal also
provides four control outputs to control external equipment (for example, pumps,
generators, etc.).
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