Administrator's Guide

ISDN service
Issue 5 October 2002 1733555-233-506
AT&T Switched Network Protocol
Avaya MultiVantage supports the AT&T Switched Network Protocol described in
the TR41449 (for 4ESS to common carrier) and TR41459 (for 5ESS to CO) ISDN
protocol standards as defined by AT&T. This protocol is used when the DS1
circuit pack is administered for Country Code 1, Protocol Version a. The AT&T
Switched Network provides you with the following services.
Access to AT&T Switched Network Services
ISDN provides access to AT&T Switched Network Services. The definition of the
Service Type field on the ISDN Trunk Group screen includes a table that outlines
these switched-network services. An ISDN trunk group may be dedicated to a
particular feature. Alternately, an ISDN call-by-call trunk group may provide
access to several features. For a description of the services accessible via ISDN
(either via dedicated or call-by-call trunk groups), see ‘‘Call-by-call service
selection’’ on page 1629.
Call Identification Display
ISDN Call Identification Display provides a transparent name and number display
for all display-equipped telephones within an ISDN network. The feature is
transparent in that the same information can be provided at all ISDN facilities.
Telephones using this feature should be digital telephones with a 40-character
alphanumeric display. The Merlin hybrid sets with 32-character displays (7315H
and 7317H) also support this feature.
ISDN Call Identification Display is provided in addition to the normal Telephone
Display and Attendant Display features when the network supports end-to-end
ISDN connectivity. When both ISDN and DCS display information are received,
the switch can display either the DCS or ISDN call identification information. If
only ISDN display information is received, information displays in ISDN format.
The display fields that may be used for ISDN are: Name, Number, Miscellaneous
Call Identification, and Reason for Call Redirection. The display information
varies, depending on the type of call, how the call is handled (for example,
whether it is redirected or not), and the information is available on the call.
CPN/BN to Host Call Identification
The CPN/BN to Host Call Identification enables CPN and BN information to be
passed from the switch to the ISDN Gateway, so that the ISDN Gateway can
forward the information to a host for data-screen delivery to agents in an ACD
split.
By delivering call-identification information such as CPN/BN and switch
information such as the answering-agent’s extension to an adjunct network (ISDN
Gateway), the adjunct automatically delivers data screens to agents for new calls
and call transfers.