MERLIN LEGEND Communications System Release 5.0
Feature Reference
555-650-110
Issue 1
June 1997
Features
Page 37
Allowed/Disallowed Lists
SECURITY
l
ALERT:
!
If the system manager wants to allow access to the voice messaging
system Outcalling feature, any entries in the default Disallowed List apply to
Outcalling calls. Any changes to the default Disallowed List entries and
other restrictions must be considered carefully in order to minimize the
potential for toll fraud.
If the system manager changes a port to a non-VMI port, the default Disallowed
List is not removed from the port. If the default Disallowed List should be removed,
the system manager must remove it from the port through system programming.
Considerations and Constraints
0
A Disallowed List takes precedence over an Allowed List. If a telephone number is
on both an Allowed List and a Disallowed List assigned to an individual extension,
the caller cannot complete a call to that number.
If a zero (0) is programmed as the first digit of an Allowed List entry, any toll
restriction assigned to an extension is removed for calls placed through a toll
operator.
Individual Allowed and Disallowed Lists are numbered 0 through 7. Within each
list, there are 10 entries numbered 0 through 9.
The Pause character (entered by pressing the Hold button) can be used as a wild
card character in Disallowed Lists, for example, to indicate that calls to a given
exchange are restricted in every area code. The Pause character is shown on the
planning form as p. Wild card characters are not permitted in Allowed List entries.
The Pause character does not act as a wild card for the
*
character.
When used in conjunction with Remote Access, Allowed and Disallowed Lists are
assigned to specific barrier codes or to types of lines/trunks: all tie/DID trunks, or
all non-tie/DID trunks. Allowed and Disallowed Lists cannot be assigned to trunks
on an individual basis.
When used with Automatic Route Selection (ARS), Allowed and Disallowed Lists
are not applied until the caller dials the ARS code and a pool is selected.
Because restrictions imposed by a Disallowed List apply to the extension used to
initiate a call to an outside number, a user with a restricted extension can
circumvent restrictions by asking an operator with an unrestricted console to
connect an outside call.
