Avaya Communication Manager Administrator's Manual page 1408

Feature Reference
Call-by-call service selection
Brief description
Call-by-Call Service Selection uses the same route patterns and route preferences that are used by AAR,
ARS, and GRS. The service or facility used on an outgoing Call-by-Call Service Selection call is
determined by information assigned in the AAR/ARS/GRS route patterns.
You can allow a variety of services to use a single trunk group. The system obtains trunking efficiency by
distributing traffic over all the available trunks. Then you can assign services that are used on incoming
and outgoing Call-by-Call Service Selection calls. The system provides traffic measurements for each
individual service administered for an ISDN Call-by-Call Service Selection trunk group.
A Call-by-Call Service Selection example is shown below.
Figure 385: Call-by-Call Service Selection example
Figure notes
1 Avaya Media Server
2 Megacom trunk group
3 Megacom 800 trunk group
4 SDN trunk group
5 OUTWATS trunk group
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6 Call-by-Call Service Selection trunk
group
7 Public-switched network
8 Without Call-by-Call Service Selection
9 With Call-by-Call Service Selection
Administrator's Guide for Avaya Communication Manager
November 2003