Instruction manual

DEFINITY® Business Communications System and GuestWorks® Issue 6
Overview
555-231-208
Issue 1
April 2000
Features
A-24Basic features
A
Individual Attendant Access
Allows a user to call a specific attendant console. Each attendant console can be
assigned an individual extension number.
Integrated Services Digital Network — Basic Rate
Interface
Enables connection of the system to equipment or end points that support an
Integrated Services Digital Network (ISDN) by using a standard format called the
Basic Rate Interface (BRI). This feature is a 192 kbps interface that carries two 64
kbps B-channels and one 16 kbps D-channel.
ISDN is a global access standard that uses a layered protocol. It eliminates the
need for multiple, separate access arrangements for voice, data, facsimile, and
video services and networks. Using the same pair of wires that now carry simple
telephone calls, ISDN can deliver voice, data, and video services in a digital
format.
The ISDN-BRI Trunk circuit pack allows the system to support the T interface and
the S/T interface as defined by ISDN standards (ITU-T recommendation I.411).
The circuit pack provides eight ports to the network and supports two B channels
and one D channel. An ISDN-BRI Trunk provides the following advantages:
■ Provides an inexpensive way to connect to ISDN services provided by the
network provider
■ Meets almost all ETSI Country protocol requirements
■ Supports essential (not supplementary) ISDN services.
Intercept Treatment
Provides an intercept tone or a recorded announcement or routes the call to an
attendant for assistance when calls cannot be completed or when use of a feature
is denied.
Intercom — Automatic
Allows two users to talk together easily. Calling users press the Automatic
Intercom button and lift the handset. The called user receives a unique intercom
ring and an intercom lamp, if provided, flashes. With this feature, users who
frequently call each other can do so by pressing one button instead of dialing an
extension number.