Pri-To-Pts - Nortel DMS-250 Reference Manual

Digital switching systems

Hide thumbs Also See for DMS-250:

Table of Contents

6-8 PRI interworking

PRI-to-PTS

The call scenario in Figure 6-6 illustrates interworking between ISDN and

PTS where the call is routed over a PTS trunk after leaving ISDN.

The progress message, with PI set to "not end-to-end ISDN," is sent back

upon encountering the PTS trunk. The progress message is mapped into the

Address Complete Message (ACM) with "interworking encountered" bits

set at the called-access switch. The ACM is then mapped to a progress at the

calling-access switch.

Interworking between PRI and PTS trunk

297-2521-106 Standard 23.01 March 2001