AT&T MERLIN LEGEND Release 4.0 Feature Reference page 36

Feature Reference
Following are examples of specific results that cannot be achieved through
programming MERLIN LEGEND:
Disallow *67 when dialing a specific exchange.
Disallow *67 only when it is followed by *69.
Default Disallowed List
In Release 3.1 and later, a default Disallowed List (list 7) is defined which
includes the following entries: ,
( p =any digit). This list is automatically assigned to any port programmed as a
VMI port.
!
Security Alert:
The system manager should assign this list to any extension that
does not need access to the numbers in the list.
The system manager should assign this list to any extension that does not need
access to the numbers in the list.
Disallowed Lists and VMI ports
In Release 3.1 and later, ports assigned as Generic VMI or Integrated VMI are
assigned the default Disallowed List.
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.
!
Security Alert:
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 thorough system
programming.
Considerations and Constraints
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.
36
Allowed/Disallowed Lists
, , , ,
, ppp
, , ,