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MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
Features and Applications
Page 4-44Features
4
Calling Restrictions 4
If you and your Lucent Technologies representative planned for calling restrictions
as part of the initial setup of the system, the settings required for these calling
restrictions are already in place. However, you may wish to change these settings
or set restrictions and privileges for new users or new lines/trunks. There are
several methods you can use to limit outgoing toll calls:
■ Toll and Outward Restrictions. Limit toll and outside calls by individual
extensions or remote access users, or on pools or trunks.
■ Allowed/Disallowed Lists. Allow some calls when calling restrictions are
in effect or disallow certain calls when restrictions are not applied.
■ Night Service Exclusion List and/or Emergency List. Allow some calls
when Night Service with the Outward Restriction option is used.
■ Pool Dial-Out Code Restriction (Hybrid/PBX Only). Restrict specific
pools. This can be used to reserve certain pools for specific purposes, for
example, for data communications.
■ Facility Restriction Levels (Hybrid/PBX Only). Automatic Route Selection
(ARS) allows Facility Restriction Levels (FRLs) to be applied to both routes
for pools of outside trunks and extensions for the most reliable control of
toll calling.
■ Remote Access. Remote access callers are required to enter barrier
codes in order to reach the system; Disallowed Lists and FRLs can also be
assigned with each barrier code.
■ Networking Routes (Release 6.0 and later systems, Hybrid/PBX mode
only). Additional FRLs apply to network routes. See the
Network Reference
for details.
In Release 3.1 and later systems, a system programming feature allows you to
help guard against toll fraud when star codes are dialed under certain
circumstances. Star codes, typically dialed before an outgoing call, provide
special services from the CO. For example, in many areas a telephone user can
dial
before a telephone number to disable central office-supplied caller
identification at the receiving party’s telephone. To allow or disallow star codes
preceding a call, see “Revising Allowed Lists” on page 6–71
or “Revising
Disallowed Lists” on page 6–74. Star code calling is not supported for calls across
a network (Release 6.0 and later systems, Hybrid/PBX mode only).
Some central offices supply a second dial tone following the dialed star (*) code,
to signal customers that they must dial additional digits. If this second dial tone is
not immediate, a hacker can enter digits that are not detected by the CO but are
detected by the system’s calling restrictions. If your business uses central office
star codes and the CO issues a second dial tone after a pause, see
System
Programming
for information about including a timed delay that causes the
system to prevent the call when digits are entered during the pause.