Nortel Networks Circuit Card 311 User Manual
Page 616
616
NT8D14 Universal Trunk card
Dial pulses or DTMF tones are then presented from the CO. When the
called party answers, the universal trunk card reverses battery and ground
on the tip and ring leads to the CO. The trunk is arranged for first party
release. The CO releases the trunk by removing the low-resistance loop, at
which time normal battery and ground are restored at the near-end. This
also applies to incoming tie trunk calls from a far-end PBX.
Note: The near-end can be configured for immediate start, delay dial,
or wink start.
An incoming call from the CO places a low-resistance loop across the tip
and ring leads. See
Figure 173 "DID trunk, loop DR call states - incoming
and
Figure 174 "DID trunk, loop DR call connection
sequence - incoming call from CO" (page 620)
Dial pulses or DTMF tones are then presented from the CO. When the
called party answers, the universal trunk card reverses battery and ground
on the tip and ring leads to the CO. The trunk is arranged for first party
release. The CO releases the trunk by removing the low-resistance loop,
at which time normal battery and ground are restored at the near-end.
The operation represented in
Figure 173 "DID trunk, loop DR call states -
incoming call from CO" (page 619)
and
Figure 174 "DID trunk, loop DR call
connection sequence - incoming call from CO" (page 620)
also applies to
incoming TIE trunk calls from a far-end PBX.
Note: The near-end can be configured for immediate start, delay dial,
or wink start.
An incoming call from the CO places a low-resistance loop across the tip
and ring leads. See
Figure 185 "DID trunk, loop DR call states - incoming
and
Figure 186 "DID trunk, loop DR call connection
sequence - incoming call" (page 634)
. Dial pulses or DTMF tones are then
presented from the CO. When the called party answers, the universal trunk
card reverses battery and ground on the tip and ring leads to the CO. The
trunk is arranged for first party release. The CO releases the trunk by
removing the low-resistance loop, at which time normal battery and ground
are restored at the near-end. This also applies to incoming tie trunk calls
from a far-end PBX.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.