Administrator's Guide

Features and technical reference
555-233-5061630 Issue 5 October 2002
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 Notes
1. Avaya Media Server
2. Megacom trunk group
3. Megacom 800 trunk group
4. SDN trunk group
5. OUTWATS trunk group
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
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