NTP-011: Circuit Order 363-206-285
Page 5 of 6 Issue 2, February 2000
DDM-2000 OC-3 MULTIPLEXER
DO ITEMS BELOW IN ORDER LISTED. . . . . FOR DETAILS, GO TO
11.
!
CAUTION:
No service DS1
LOW SPEED
slots should be left empty in
groups equipped with
MXRVO
or
STS1E
(high speed mode)
and protection
DS1/DS1PM
circuit packs.
NOTE:
177A Retainer Cards are used to disconnect the
cross-connect wiring associated with unused service DS1
slot locations from the DDM-2000’s internal protection bus.
Install 177A Retainer Card(s), as required, into the DS1 slot(s) for
the DS1/DS1PM circuit pack(s) removed.
12.
NOTE:
If a port is in the nmon (n) state, the signal is not monitored
or alarmed. The port will not automatically go to the in
service (i) state when a signal is detected as it will in the
auto (a)state.Inthenmon state, the port must be returned
to the auto state, using the set-state-t1: command, to
turn on monitoring of signal failures and before any circuit
packs associated with that port can be removed from the
equipment list by the upd command.
If circuit packs have been removed, momentarily depress the
UPD/INIT button on the SYSCTL or use the upd command to
update the DDM-2000 internal equipment list.
If circuit packs have
not
been removed, use the set-state-t1:
command to set the port state of the DS1 port(s) to auto or
nmon, as required.
13. Verify all alarms are off.
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