AT&T DS1/DMi/ISDN-PRI manual Introduction

INTRODUCTION 1-31

Full DCS feature transparency is provided between two or more Generic 2s interconnected with ISDN-PRI facilities. The supported voice terminal features include:

●Abbreviated dialing

●Alphanumeric display

●Automatic callback

●Call coverage

●Call forwarding — all calls

●Call waiting — terminating

●Call waiting — conference

●Priority calls

●Distinctive ringing

●Leave word — calling (no AP)

●Leave word — call transfer

9 . When ISDN-PRI facilities connect an ETN main to an ETN tandem, the main must do additional routing since cut-through operation is not permitted. Dialed digits must first be collected and then the setup message transmitted to the tandem.

Automatic Voice Networks (AUTOVON) and tandem tie-trunk networks (TTTN) and Common- Control Switching Arrangement (CCSA) or Enhanced Private Switched Communications Service (EPSCS) networks that use E&M trunks cannot be served by ISDN-PRI trunks. DS1 facilities that use robbed-bit inband signaling will work. AUTOVON service is not supported for Generic 2 version 1.0 equipped with one or more universal modules.