AT&T MERLIN LEGEND Release 3.0 System Programming Manual page 401

Lines and Trunks
Trunks to Pools Assignment
Use this procedure to create trunk pools (groups of outside lines/trunks
connected to the system). Trunk pools are used to specify preferred routes for
Automatic Route Selection (ARS). In addition, trunk pools enable users to select
a line/trunk by dialing a pool dial-out code or by pressing a single button on the
telephone. (A separate button for each line/trunk is not needed. ) Each pool
should contain trunks of the same type (for example, loop- or ground-start or
WATS); however, ground- and loop-start trunks of the same type can be
included in the same pool. Ground-start trunks must be manually assigned. A
maximum of 11 trunk pools is allowed. A trunk can be assigned to only one
pool.
Do not mix different service areas of WATS (Wide Area Telecommunications
Service) trunks or FX (Foreign Exchange) lines to different cities. Do not include
both incoming only and outgoing only lines/trunks in a pool.
If you want to reassign a line/trunk to a different pool, you must remove it from
the current pool before you assign it to the new pool. Once you assign a
line/trunk to a pool, it can be assigned to a button only on a direct-line console
operator position; individual lines intended for personal use on telephones other
than the DLC console should not be assigned to pools.
DID trunks cannot be grouped in pools. Loop-start are automatically placed in
pools and must be removed manually if used for paging loudspeakers, Music
on Hold, or maintenance alarms.
Dial-in tie trunks should not be grouped in pools if you intend to assign Pool
buttons on telephones.
If you are using Automatic Route Selection, the main pool (factory-set dial-out
code 70) must contain loop- or ground-start trunks.
The system provides an error tone when a line/trunk is in use or if a loudspeaker
paging system, Music on Hold, or maintenance alarm is already assigned;
however, the system does not indicate the reason for the error tone.
NOTE:
This procedure applies to Hybrid/pBX mode only.
Summary: Trunks to Pools Assignment
Programmable by
Mode
Idle Condition
Planning Form
System manager
Hybrid/PBX
Trunk idle
Form 2c, System Numbering: Line/Trunk Jacks
Programming Procedures
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