363-206-204
Equipment and Front Access Cable Installation
Issue 9 October 1998
3-21
4. Route the cable out of the DDM-2000 OC-3 bay to a wire-wrap panel (or
where connections can be made), stacking cables as shown in Figure 3-2.
5. Cut the miscellaneous (environmental) discrete telemetry cable to the
desired length at the telemetry panel.
6. Wire-wrap the loose end of the miscellaneous (environmental) discrete
telemetry cable to the wire-wrapped panel, making connections as shown
in Table 3-8 and 3-9 and Figure 3-8, 3-9 or 3-10.
NOTE
:
Each miscellaneous (environmental) discrete telemetry designation is con-
nected to the DDM-2000 OC-3 by two leads (wires).
NOTE
:
For each input, one lead should be connected to input-common and the
other lead should be connected to the appropriate alarm indication.
NOTE
:
For each output, one lead should be connected to output-common and the
other lead should be connected to the appropriate alarm indication.
NOTE
:
To input the external minor (MN) alarm or power minor (PMNT-IN) alarm,
one lead should be connected to the appropriate external alarm source
and an external ground should be connected to output common.
DS1 Timing Cable Installation - Front
Access
Description
A DS1 timing cable is required if the shelf is to be externally timed. Mult cables are
required if the timing from the shelf directly connected to the DS1 Reference clock
is to be daisy-chained to the remaining shelves in the bay.
DS1 external timing is provided by the BBF2B TGS circuit pack to time a BITS
clock. When the shelf is configured to provide a sync output and the BBF2B circuit
packs are externally timed to a DS1 Reference, a Sync Input timing cable is
required.
Connection of DS1 timing requires access to DS1 signals referenced from a
Stratum 3 or better clock.
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