MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 482Pools
NOTE:
On initialization of a Release 1.0 system, all loop-start and
ground-start line/trunk programming reverts to loop-start. The
ground-start pool never has trunks assigned to it automatically but
must be programmed after the ground-start jacks are designated. In
Release 1.1 and later systems, ground-start trunks are assigned to
the ground-start pool on initialization, except in a system modified for
permanent Key mode operation.
■ All dial-in tie trunks are assigned to the pool with the factory-set extension
number 891.
■ All automatic-in tie trunks are assigned to the pool with the factory-set
extension number 892.
NOTE:
The factory setting for the type of line/trunk connected to a 400 LS, 800
GS/LS, 408 GS/LS, 408 GS/LS-MLX, or 800 GS/LS-ID module is
loop-start. The system does not automatically make pool assignments for
loop-start, ground-start, or tie trunks that are emulated by using a T1
facility. Each of these types must be grouped into a pool through system
programming.
The system can have a maximum of 11 pools. Each pool can be assigned to a
button on a maximum of 64 extensions. The number of lines/trunks in each pool is
limited only by the number of lines/trunks connected to the system. However, a
line/trunk can be assigned to only one pool.
In Release 6.0 and later systems (Hybrid/PBX mode only), consider the following
points when planning pools:
■ All private networked trunks must be assigned to pools; a different pool
should be used for each type of trunk (T1-emulated tie trunks, PRI trunks,
and analog tie trunks).
■ Users must not be given dial access or Pool button access to pooled
private trunks. To use these pools, users dial non-local dial plan extensions
just as they would local extensions. They also use these pools when they
dial ARS for outside calls, and the ARS tables route the calls to other
networked switches (see “Automatic Route Selection” on page 68
and
“Tandem Switching” on page 671
for details).
■ To allow local users to dial extensions on a remote networked system, UDP
routing is used. Pools containing tandem PRI trunks should be assigned to
Route 1. For details, see “Uniform Dial Plan Features” on page 710
.
■ If a directly networked system has no trunks connected to the public
switched telephone network, the pool and ARS assignments listed below
are required in order to make equal access (10xxx, 101xxxx, also called
Interexchange
or
IXC
) calls.
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