AT&T MERLIN LEGEND Communications System PBX System Planning Manual page 154

Features
Subpatterns
For each table (1 through 16, and the factory-set tables 17 and 18), you can
select two subpatterns that specify routes that should be used depending on
the time of day. You can specify up to six routes for each subpattern. For
example, you may want calls to certain area codes routed over WATS trunks
during the day, and after 11 p.m., when toll rates are less expensive on basic
trunks, you may want the calls routed over the main pool.
Preferred and Alternate Routes
Pools. The column with the 'Pool" heading is used to list the trunk pools you
want to use to route calls made to the area codes and/or exchanges listed in the
"Area Codes/Exchange" section. You can specify up to six alternate routes for
each subpattern.
Facility Restriction Level (FRL). The FRL is a number between O and 6 that
is used to restrict user access to the route. You begin by assigning a value to
each route you list in the 'Pool" section. A value of O is the least restrictive, and a
value of 6 is the most restrictive. The factory setting is 3.
Assign a value of O, for example, for local calls. This makes the assigned routes
available to all users. Assign a value of 1 through 6 according to any restrictions
you plan for certain facilities. For example, if you want to limit use of a particular
pool of WATS trunks only to top executives, assign an FRL of 6 for the route.
Note: You will assign an FRL value to telephones and Remote Access trunks
that corresponds to the route FRL that determines whether the user can make
calls using a particular route.
Other Digits. Extra digits or special characters maybe required so the system
can route a call on a particular trunk pool. For example, some companies use an
alternate long-distance company for calls to certain area codes. Accessing the
alternate long-distance company requires dialing the number, waiting for a dial
tone, and then dialing six more digits and waiting for the dial tone again. The
pauses and extra digits can be automatically added to numbers dialed in the
area codes listed on the table by specifying them in the 'Other Digits' column.
Digit Absorption. The column labeled 'Absorb' specifies how many, if any, of
the digits dialed by the caller should be absorbed (not dialed) by the system
when it places these calls. This ensures that the business gets the full benefit
from any special-purpose trunks such as FX and tie. You include the number of
digits to absorb (0-11, starting with the first digit) in the tables so the system
can route all appropriate calls to these lower-cost pools.
Digit absorption doesn't interfere with Station Message Detail Recording (SMDR)
or Call Restriction. The digits dialed by the caller are recorded on SMDR reports
and are checked to be sure the call is allowed.
System Features 4-49