Nortel Networks 311

626 NT8D14 Universal Trunkcard

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-endPBX" (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, reversebatter y 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-endPBX"

(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 formof DTMF tones or dial pulses. If

answer supervision is provided by the far-end, reversebatter y 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

Release 5.0 23 May 2008