AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 102

Trunks
System Programming for
See
instructions.
Consider the following information as you select the types of buttons to assign to
each telephone.
For multiline telephone users:
You can assign a combination of up to 10 System Access Voice, System
Access Ring, System Access Originate Only, or Shared System Access
buttons to each telephone (excluding operator positions).
If you plan to use Automatic Route Selection (ARS), consider keeping the
factory-set button assignments. They ensure that if each user is busy on a
call at least one additional button is available to receive a call and another is
available to make a call. This leaves the rest of the buttons on multiline
telephones free for customizing.
Consider assigning Shared System Access buttons to small groups of users
who need to be able to answer and distribute each other's calls easily or be
able to join conversations. Each Shared System Access button you assign
corresponds to a System Access Ring or System Access Voice button on
another telephone. Therefore, to provide complete coverage within the
group, you must be sure that each System Access Ring and System Access
Voice button assigned to a telephone is also assigned to other members of
the group. Each System Access Ring or System Access Voice button on a
telephone can be assigned as a Shared System Access button on up to 16
other telephones.
Assign a Pool button when a specific trunk pool (for example, WATS or FX) is
used frequently. Also consider assigning Pool buttons if you do not plan to
use ARS and the system includes only one or two pools.
Assign Personal Line buttons when an exclusive private number is needed,
for example, for a company executive. Any trunk connected to the system
can be used as a personal line as long as it is not in a trunk pool.
For single-line telephones, answering machines, fax machines, or any other
device connected to a 012 or 008 OPT module:
The factory settings for System Access buttons can be changed; however,
these settings should be adequate to meet most user needs since System
Access buttons can be used to make and receive both inside and outside
calls. Each station must have at least one System Access button.
If you want the station to receive outside calls on a specific trunk, assign a
Personal Line button; if you want the station to receive outside calls on a
trunk included in a pool, assign a Pool button.
For adjuncts connected using an MFM, it's recommended that you change the
button 2 assignment to System Access Originate Only and remove the button 3
assignment.
Trunk Assignment 3-47