Nortel DMS-250 - Feature Interaction; Introduction; Integrated Services Access

Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
7-1
Feature interaction
Introduction
The services and features supported on PRI are listed below, and described
in this chapter:
• integrated services access
• call type delivery
• bearer capability for PRI
• calling number delivery
• PRISM service
• VNET service
• SAC (800/900) service
• call authorization
• suppcode/account code collection
• PRI data calls
• network call transfer
• user to user
• network call identifier
• EVS audio response unit
• RLT/ATP
• Fraud Call Interrupt
Integrated services access
With integrated services access (ISA), any open circuit can originate or
terminate any subscribed service. With this service-based architecture, calls
originating over an ISA PRI facility are handled based on the call type.