Facility Restriction Levels; Pool Dial-Out Code Restriction - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Features

Pool Dial-Out Code Restriction

Apply to: Extensions and remote access barrier codes, in Hybrid/PBX mode
only
Use with: Any other restrictions
This restriction prevents an extension from dialing specific pool dial-out codes.
This restricts outgoing calls from specific pools and can be used to reserve
pools for specific purposes, for example, data communications. Beginning with
Release 3.1, the default setting for this restriction is on; no extension or remote
access user with a barrier code has access to pools until the restriction is
removed.
Facility Restriction Levels (FRLs)
Apply to: Extensions in conjunction with lines/trunks, in Hybrid/PBX mode only
Use with: Any other restrictions. Use Disallowed Lists if an FRL is unrestricted,
and use Allowed Lists if an FRL is highly restricted, particularly for
emergency numbers. Not necessary for remote access trunks (used
to reach the system) if barrier codes are used. Can be used on all tie
trunks.
Automatic Route Selection (ARS) is a Hybrid/PBX mode feature where the
system is programmed with dialing plans (called routes ) that specify certain
lines/trunks or network services for outgoing calls, and can choose the most
economical facility for a given call at a given time of day. Facility Restriction
Levels (FRLs) are assigned to specific routes in an ARS table. There are seven
different FRLs that can be assigned to routes, ranging from 0 to 6, where 0 is
the least restricted and 6 is the most restricted.
In conjunction with FRLs assigned to routes, FRLs from 0 to 6 are also assigned
to extensions and are used to determine whether callers have permission to use
the routes. For an extension, 0 is the most restricted and 6 is the least restricted.
To use a route, the telephone must have an FRL equal to or greater than the
route's FRL. In other words, an extension with an FRL of 0 has the fewest ARS
privileges (routes with levels 1 through 6 cannot be used), and an extension
with an FRL of 6 has the most privileges (any route may be used). Table 4–11
shows some examples.
In Release 3.1 and later systems, default FRLs help system managers guard
against toll fraud. These restrictions are automatically applied to routes, voice
messaging ports, and to the barrier codes of remote access users, as follows:
4–40
Features and Applications