Lucent Technologies 8.2

DEFINITY ECS Release 8.2

Administrator’s Guide

555-233-506 Issue 1

April 2000

Screen reference

739ISDN trunk group

ISDN-PRI interfaces are supported by the TN767 circuit pack (for assignment of a

T1 signaling link and up to 24 ISDN-PRI trunk group members), or the TN464C

or later circuit pack (for assignment of a T1 or E1 signaling link a nd up to 24 or 31

ISDN-PRI trunk group members, respectively). The TN2464 and TN2207 circuit

pack can also be used with ISDN-PRI.

■For R7si and later configurations and R7csi and later configurations, the

D-channel for ISDN-PRI interfaces switches through either the TN765

Processor Interface (PI) circuit pack or the TN 778 Packet Control

(PACCON) circuit pack. The D-channel for ISDN-BRI interfaces only

switches through the TN778 Packet Control (PACCON) circuit pack.

NOTE:

You cannot use the TN765 circuit pack with ISDN-BRI interfaces.

■For R7r and later configurations, the D-channel switches through the

TN1655 Packet Interface (PKTINT) circuit pack.

■A TN780 or TN2182 Tone Clock circuit pack provides synchr onizat ion fo r

the DS1 circuit pack.

NOTE:

The TN767 cannot be used to carry the D-channel if either the TN778

(PACCON) or TN1655 (PKTINT) circuit packs are used t o switch the

D-channel. However, in these circumstances, the TN767 can be used

for NFAS interfaces carrying only B-channels.