Nortel Networks Circuit Card 311 User Manual

Page 626

626

NT8D14 Universal Trunk card

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 187 "Two-way, loop DR, tie

trunk call states - incoming call from far-end PBX" (page 635)

and

Figure 188

"Two-way, loop DR, tie trunk call connection sequence - incoming call from
far-end PBX" (page 636)

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 179 "Two-way, loop

DR, TIE trunk call states - outgoing call to far-end PBX" (page 627)

and

Figure 180 "Two-way, loop DR, TIE trunk call connection sequence -
outgoing call to far-end PBX" (page 628)

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

181 "Two-way, loop DR, TIE trunk call states - outgoing call to far-end PBX"
(page 629)

and

Figure 182 "Two-way, loop DR, TIE trunk call connection

sequence - outgoing call to far-end PBX" (page 630)

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 183 "Two-way, loop DR, TIE

trunk call states - outgoing call to far-end PBX" (page 631)

and

Figure 184

"Two-way, loop DR, TIE trunk call connection sequence - outgoing call to
far-end PBX" (page 632)

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 183

"Two-way, loop DR, TIE trunk call states - outgoing call to far-end PBX"
(page 631)

and

Figure 184 "Two-way, loop DR, TIE trunk call connection

sequence - outgoing call to far-end PBX" (page 632)

also applies to

outgoing calls on a DID trunk.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard