MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 37Allowed/Disallowed Lists
Description 0
Used in conjunction with calling restrictions (outward and toll), an Allowed List is a
list of numbers that the caller is allowed to dial, despite restrictions. For example,
an Allowed List assigned to an outward-restricted extension can allow calls to
specific local numbers, such as 911 or toll numbers. For toll-restricted extensions,
an assigned Allowed List can allow calls to specific area codes and/or exchanges
needed for daily tasks.
A Disallowed List is a list of local or toll numbers that the extension user is not
allowed to dial, even if the extension is otherwise unrestricted. Disallowed Lists
can be used as an alternative to, or in conjunction with, calling restrictions.
Both Allowed Lists and Disallowed Lists are assigned to individual extensions.
Disallowed Lists can also be used in conjunction with Remote Access to restrict
calls made through the system from remote locations. In this case, Disallowed
Lists can be assigned to either specific remote access barrier codes or (if barrier
codes are not used) to specific types of lines/trunks (all tie/Direct Inward Dialing
(DID) and all non-tie/non-DID trunks).
SECURITYlALERT:
!
Do not assign any Allowed List to a remote access barrier code or to the
default class of restriction (COR) for all tie or all non-tie trunks. When used
in conjunction with toll and local restrictions applied to the barrier code or
COR, Allowed Lists do not work.
In Release 6.0 and later systems (Hybrid/PBX mode only), when a system’s
trunks are used by callers on remote systems to make outside calls, the system
manager assigns Disallowed Lists to the Remote Access default tie and/or non-tie
class of restriction. When a call crosses from one system to another in a network,
the receiving system treats the call as a remote access call without a barrier code
and consults the Disallowed Lists, along with other Remote Access default tie
and/or non-tie settings (excluding the barrier code requirement), to permit or
forbid the call.
When a Disallowed List is assigned to a barrier code, the remote access user
using that code cannot reach the specific numbers included in the list.
If barrier codes are not used for remote access, then Disallowed Lists for remote
access users can be assigned to all tie/DID trunks and all non-tie/non-DID trunks.
A Night Service Emergency Allowed List can be programmed with up to 10
numbers that anyone can dial without having to enter a Night Service password.
For additional information, see “Night Service” on page 442
.
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