AT&T MERLIN LEGEND Release 4.0 Feature Reference page 38

Feature Reference
Conference
Directories
Forward and
Follow Me
Night Service
Personal Lines
Remote Access
Speed Dial
Toll Type
38
Allowed/Disallowed Lists
A user with a restricted extension cannot add a participant (outside or
toll) to a conference call unless the participant's number is on the
Allowed List for that extension.
A user cannot add an outside number to a conference call if the number
is on a Disallowed List.
A user with a restricted extension cannot use the System Directory to
dial a restricted number unless the System Speed Dial number is
marked or the number is on the Allowed List for that extension.
A user with a restricted extension cannot forward calls to a restricted
(outside or toll) number unless the number is on the Allowed List for that
extension. If the number is on the Disallowed List for that extension, the
call cannot be forwarded. When activating Forward, a user with a
restricted extension does not hear an error tone, but when a call is
received, the Forward is denied if the number is not on the Allowed List.
A Night Service Emergency Allowed List can be programmed with up to
10 numbers that any user can dial without having to enter the Night
Service password. For additional information, see "Night Service."
A user with a restricted extension cannot dial a restricted number
(outside or toll) on a personal line button unless the number is on the
Allowed List for that extension. If the number is on a Disallowed List, the
user cannot dial it.
Both Allowed and Disallowed Lists are assigned as items of the class of
restriction (COR) for the Remote Access feature. When barrier codes
are not used, Allowed and Disallowed Lists are assigned to trunks
systemwide. When barrier codes are used, Allowed and Disallowed
Lists are assigned to individual barrier codes.
When a marked System Speed Dial number (the dialed number is
suppressed from the display) is used to dial a number, calling
restrictions (such as toll or outward restrictions, or Allowed and
Disallowed Lists) assigned to that extension are overridden. When an
unmarked System Speed Dial or a Personal Speed Dial number is used
to dial a restricted number, the call cannot be completed unless the
number is on the Allowed List for that extension.
When trunks with different toll types are connected (for example, basic
trunks and PRI facilities), people must dial a toll prefix ( or ) for toll
calls on some trunks, but it is not required on other trunks. In such
instances, two Disallowed List entries are needed to restrict users from
dialing specific area codes and/or telephone numbers. For example, to
restrict users from dialing area code 505, the Disallowed List must
include both 505 and 1505.