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TR-LN-BD (Trunk Line Board)
Issue 4 May 2002 10-1819 555-233-123
TR-LN-BD (Trunk Line
Board)
The TN797 Analog Trunk and Line circuit pack provides 8 ports, any of which may
be administered as one of the following:
In the U.S., Canada, and like countries, all CO trunk ports of TN797 Analog Trunk
and Line circuit pack should be administered as ground start (GS) trunks rather
than as loop start trunks, because GS signaling provides disconnect supervision,
and loop start does not. If for some reason, a port on the TN797 must be
administered as loop start, it must be administered as one-way only – either
incoming or outgoing – not only at the DEFINITY switch, but also at the CO
switch. This is necessary to avoid collisions, i.e., “glare”, and other highly
undesirable conditions.
The TN797 Analog Trunk and Line circuit pack does not support Neon Lamp
Message Waiting Indication (MWI). No maintenance of the terminal connected to
the Neon Analog Line circuit pack is performed.
For circuit pack problems, refer to the “XXX-BD (common port circuit pack)”
maintenance documentation.
Table 10-662. TN797 Analog Trunk and Line circuit pack – port administration
Function Group Type Trunk Type LED MWI
Central Office trunk
(CO)
co
fx
wats
loop start
ground start
CAMA/E911 trunk cama
Direct Inward Dialing
(DID) trunk
did
wink start
immed start
Analog Line
on-or-off premises
n/a n/a
with/
without MWI