Nortel Networks 1000 - Manual (Page 542)

542 NT8D14 Universal Trunk card
or dial pulses. When the called party answers, an answer supervision
signal is sent by the software, causing the CS 1000 to reverse battery
and ground on the tip and ringleads to the far-end. Far-end disconnect
is initiated by opening the loop while the near-end disconnect is initiated
by restoring normal battery and ground. The operation represented in
Figure 171 "Two-way, loop DR, tie trunk call states - incoming call from
far-end PBX" (page 551)
and Figure 172 "Two-way, loop DR, tie trunk call
connection sequence - incoming call from far-end PBX" (page 552) also
applies to incoming DID trunk calls from a CO.
Note: Where no near-end answer supervision is provided, the party at
the far-end hangs up after recognizing near-end call termination.
Outgoing calls
In an outgoing call configuration, the NT8D14 Universal Trunk card is
connected to an existing PBX by a tie trunk. See
Figure 163 "Two-way,
loop DR, TIE trunk call states - outgoing call to far-end PBX" (page
543)
and Figure 164 "Two-way, loop DR, TIE trunk call connection
sequence - outgoing call to far-end PBX" (page 544) .
An outgoing call from the near-end seizes the trunk facility by placing a
low-resistance loop across the tip and ring leads. Outward addressing is
then applied from the System in the form of DTMF tones or dial pulses.
If answer supervision is provided by the far-end, reverse battery and
ground on the tip and ring leads are returned. The operation represented
in
Figure 165 "Two-way, loop DR, TIE trunk call states - outgoing call to
far-end PBX" (page 545) and Figure 166 "Two-way, loop DR, TIE trunk
call connection sequence - outgoing call to far-end PBX" (page 546) also
applies to outgoing calls on a DID trunk.
Note: Where no far-end answer supervision is provided, the party at
the near-end hangs up, after recognizing far-end call termination.
In an outgoing call configuration, the universal trunk card is connected
to another PBX by a TIE trunk. See
Figure 167 "Two-way, loop DR, TIE
trunk call states - outgoing call to far-end PBX" (page 547) and Figure 168
"Two-way, loop DR, TIE trunk call connection sequence - outgoing call
to far-end PBX" (page 548)
.
An outgoing call from the near-end seizes the trunk facility by placing a
low-resistance loop across the tip and ring leads. Outward addressing
is then applied from the Meridian 1 in the form of DTMF tones or dial
pulses. If answer supervision is provided by the far-end, reverse battery
and ground on tip and ring is returned. The operation represented in
Figure 167 "Two-way, loop DR, TIE trunk call states - outgoing call to
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.