PA-CFTB

8-party Conference Trunk

PA-CFTB

8-party Conference Trunk

1.General Function

The PA-CFTB (CFT) circuit card provides an interface for establishing a conference, which is made up of a maximum of eight parties.

A maximum of seven Tie Lines can participate in a conference when the associated trunks can receive an answer signal and a release signal from the distant switching system. On the other hand, in the case of a C.O. line, one C.O. line can be connected even if the public switching system cannot send an answer signal and/or release signal. Note that a Tie Line and a C.O. Line cannot take part in a conference at the same time. The card adopts “N-1 addition” method for establishing a conference.

Note: This circuit card is used for following features:

Station-Controlled Conference (Refer to Feature Programming Manual [S-56])

Attendant-Controlled Conference (Refer to Feature Programming Manual [A-2])

Add On Conference-8 Party (Refer to Feature Programming Manual [A-121])

Group Call-Automatic Conference (20-party) (Refer to Wireless System Manual)

This diagram shows an example of a “Preset” conference involving Tie Line connections.

INT

SW

INT

CH

PA-CFTB

Answer/Release Signal

 

 

 

 

 

 

7

 

 

TLT

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

NETWORK

 

 

5

 

 

 

 

 

 

 

TLT

 

 

4

PCMINT

VPROC

 

 

 

3

 

 

 

 

 

LC

 

 

2

 

 

Conferee

 

 

1

 

 

 

 

 

 

 

LC

 

 

0

 

 

 

 

 

 

 

Conference

 

 

 

 

 

Originator

 

 

 

 

 

Local I/O Bus

 

 

 

 

 

 

 

 

PCM INT: PCM Interface

CPU

GT

 

VPROC: Voice Processor Block

Figure 3-1 Location of PA-CFTB (CFT) within the System

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NEC 2400 ipx manual Pa-Cftb, Party Conference Trunk

2400 ipx specifications

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