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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1171Automatic routing — general
20
Trunking facilities
DEFINITY ECS 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.
1N00 11 11 deny fnpa
1NX 11 11 deny fnpa
Legend:
N - 2 through 9
X - any digit (0 - 9)
deny - deny
fnpa - foreign number plan area (10-digit call)
hnpa - home number plan area (7-digit call)
intl - international
iop - international operator
op - operator
svc - service
Table 13. ARS Digit Analysis Default Translations —
Continued
Total Digits
Dialed String Min. Max. Route Pattern Call Type
Continued on next page