LAR in Route Patterns

[TeleChick]

Does anyone know when to use the LAR feature in the route pattern? Will this address glare issues?
Thanks...

Pattern Number: 6 Pattern Name:

Grp FRL NPA Pfx Hop Toll No. Inserted DCS/ IXC
No Mrk Lmt List Del Digits QSIG
Dgts Intw
1: 21 4 613 3 1 n user
2: 21 4 613 3 1 n user
3: 36 4 613 3 1 n user
4: n user
5: n user
6: n user

BCC VALUE TSC CA-TSC ITC BCIE Service/Feature BAND No. Numbering LAR
0 1 2 3 4 W Request Dgts Format
Subaddress
1: y y y y y n n rest rehu
2: y y y y y n n rest next
3: y y y y y n n rest none
4: y y y y y n n rest none
5: y y y y y n n rest none
6: y y y y y n n rest none

 

[koglass]

Look-ahead routing
Look-Ahead Routing (LAR) allows the switch to reroute an outgoing ISDN call
that is not completing. The switch attempts to complete the call along a different
routing preference, or it tries the current routing preference a second time. If the
current preference fails twice, the next routing preference is tried.
LAR can be administered at an origination switch or a tandem switch. It can be
turned off at different points in the network to reduce network load. You use LAR
with AAR and ARS, GRS, and UDP) You can also use it with a FAC ISDN
Access Code. A LAR field is administered on the Route Pattern screen.
NOTE:
When LAR is used in a mixed network of Avaya MultiVantage Systems and
DEFINITY ECS switches, LAR ends at the DEFINITY ECS switch and
calls are rejected the normal way. However, if a LAR-triggering cause value
is passed back in the network to a DEFINITY server that is enabled for
LAR, LAR is attempted from that switch again.
Detailed description
LAR can be administered for each ISDN route preference in each Pattern Number.
The maximum number of LAR attempts per call per switch is 2 times the number
of route preferences in the route pattern. LAR can be administered at each
intermediate node that the call may be tandemed through to allow the attempt of
all possible routes.
You can control LAR by:

administering it on a per route-preference basis

partitioning trunks

limiting the number of hop counts

LAR terminates when:

call is successfully routed

call is rejected with a non-LAR-triggering cause value

no further route preference can be used to route the call