MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 79Automatic Route Selection
NOTE:
In Release 6.0 and later systems (Hybrid/PBX mode only), FRLs
associated with extension numbers apply both to ARS calls and to local
and non-local dial plan-routed calls over private networked trunks,
including those used to reach non-local dial plan extension numbers. See
“Tandem Switching” on page 671
and “Uniform Dial Plan Features” on
page 710 for details.
For a call, any route that does not match the call type (voice or data) is eliminated
from eligibility. Each route may be specified as voice, data, or both.
If a voice call is queued for callback on a digital pool, it can get stuck in an infinite
loop of queuing. The caller hears a continuous stutter tone and cannot get rid of it.
To avoid this situation, be sure that you correctly program the voice and/or data
capabilities of pools of PRI and BRI facilities in the ARS tables.
Any remaining eligible routes are scanned from the beginning of the list. The first
eligible route that is not busy is selected. If all eligible routes are busy, the user
hears fast busy and can use Callback to queue the call
for the first route only.
In
Release 6.0 and later systems (Hybrid/PBX mode only), callers who are
accessing ARS over private trunks can queue for a private trunk pool on their
switch but not for a route on the remote system associated with a PSTN trunk on
that system.
NOTE:
Emergency numbers must be on an Allowed List to be called from a
restricted extension.
Considerations and Constraints 3
ARS restrictions (FRLs) operate independently of dial-access-to-pool restrictions,
providing greater flexibility in assigning the type of usage an extension is allowed.
The international dialing code (011) can be included in any fully programmable
table. If this is done, calls beginning with 011 are routed according to the table on
which 011 is entered, and not according to the Dial 0 Table.
The wild card character (Pause) cannot be used in system programming to enter
area codes and/or exchanges in ARS tables.
In Release 6.0 and later systems, a non-local system’s ARS access code must
not be included in the non-local dial plan. To do so would allow users to dial out of
the remote networked systems, bypassing local restrictions. If you attempt to
include the local system’s ARS access code in the non-local dial plan, the
programming is blocked. In a network, it is recommended that all systems use the
same ARS access code. For additional information, see “Tandem Switching” on
page 671 and “Uniform Dial Plan Features” on page 710.
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