Avaya Communication Manager Administrator's Manual page 1387

Trunking facilities
Avaya Communication Manager can serve as an electronic tandem network (ETN). An ETN is a network
of privately-owned trunk and switching facilities that provide a cost-effective alternative to long-distance
calling between locations. Each switching facility in an ETN has a unique private-network office code
consisting of 1–8 digits.
Traveling Class Marks (TCM) represent the caller's Facility Restriction Level (FRL) or the FRL of the
caller's access trunk group, and are sent with AAR and ARS numbers sent on ETNs.
Routing with ISDN and overlap sending
You can turn on overlap sending to work on AAR and ARS calls that are routed over ISDN trunk groups.
Overlap sending sends ISDN call-address information one digit at a time instead of all the address
information going out in one block. This significantly decreases call setup time in countries with complex
public-network numbering plans, and is most useful for tandemed calls. See ISDN-PRI Trunk Group and
ISDN-BRI Trunk group screens for information on how to set up overlap sending.
Interactions
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Abbreviated Dialing
The switch does not check the FRL on an AAR or ARS call that uses a privileged Abbreviated
Dialing Group List.
Related topics
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AAR and ARS Digit Analysis Table
•
AAR and ARS Digit Conversion Table
•
AAR and ARS partitioning
•
ARS Toll Table (ARS only)
•
Class of Restriction
•
Dial Plan Analysis Table
•
Feature Access Codes
•
Generalized Route Selection
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Look-Ahead Routing
•
Node Number Routing
•
Route Pattern
•
Remote Home Number Plan Area
•
Time of Day Routing Plan
•
Toll Analysis (ARS only)
Administrator's Guide for Avaya Communication Manager
November 2003
Feature Reference
Automatic routing — general
1387