Lucent Technologies 8.2 User Manual

Page of 1707
DEFINITY ECS Release 8.2
Administrator’s Guide  
555-233-506  
Issue 1
April 2000
Features and technical reference 
1295
Call-by-Call Service Selection 
20
Considerations
An analog telephone user must place the active call on soft hold and dial 
the Answer Hold-Unhold feature access code to answer the waiting call.
If an analog single-line telephone has Call Waiting enabled and has 
initiated a conference call, Call Waiting is denied. For example, caller A 
(on an analog telephone) is talking to caller B, then flashes and is talking to 
caller C, and then flashes to conference B and C. Then, if caller D attempts 
to call caller A, Call Wait is denied.
Interactions
Call Waiting is denied when the following features are activated at the single-line 
telephone:
Another Call Waiting Call
Automatic Callback (to or from the telephone)
Data Privacy
Data Restriction
A Call Waiting call cannot be picked up by a Call Pickup group member or by 
directed call pick-up.
Call-by-Call Service Selection 
Call-by-Call Service Selection enables a single ISDN trunk group to carry calls to 
a variety of services. It does not require that each trunk group be dedicated to a 
specific service. It allows you to set up various voice and data services and 
features for a particular call.
Call-by-Call Service Selection provides the following benefits:
Cost reduction
 —
 Since many services share the same trunks, the total 
number of trunks can be reduced.
Improved service
 —
 Features and services are less likely to be blocked.
Simplified Networking
 —
 Network engineering is simplified because 
analysis of trunking needs can be done based on total traffic instead of on a 
per-service basis.
Timely response to changes — With UAPs, the network does not have to be 
consulted.
Measurement of Call-by-Call Service Selection calls