363-206-305
Operations Interfaces
6-16
Issue 3 June 2000
User-Definable Miscellaneous
Discretes
—
Environmental Alarms and
Controls
6
To allow monitoring and control of equipment collocated with a DDM-2000
FiberReach Multiplexer in a remote site, a set of user-definable miscellaneous
discrete environmental alarms and controls is provided.
Twenty-one miscellaneous discrete alarm/status points are provided to monitor
environmental conditions at remote terminal sites (open door, high temperature,
etc.). The first 14 points and points 16 through 21 are activated by contact
closures. The fifteenth point (External Minor) is for monitoring of remote structure
power and fan apparatus (for example, DC power shelf failure); this point is
activated by a
−
48 volt input.
Four control points are provided to control equipment (pumps, generators, etc.) at
remote terminal sites. When activated, the control points provide a contact closure
between the control point output and ground.
Miscellaneous discrete alarms/statuses and controls are transmitted between the
remote DDM-2000 FiberReach Multiplexers and the DDM-2000 OC-3 Multiplexer
host via the SONET section DCC. OS access to all miscellaneous discretes
alarm/status points (1 through 21) is provided via TL1.
Figure 6-5 shows OS access to miscellaneous discretes through the DDM-2000
Multiplexer at the CO. Access to all miscellaneous discrete alarm/status points is
also provided through the CIT. The state of the control points can be reported but
not controlled through the CIT. Control points are activated by the TL1 command
OPR-EXT-CONT
.
The names and alarm levels of the 21 alarm/status points and the names of the 4
control points can be provisioned through the CIT in remote systems. Refer to the
set-attr-env, set-attr-cont, rtrv-attr-env,
and
rtrv-attr-
cont
commands in Chapter 11, "Commands and Reports."
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