Lucent Technologies MERLIN LEGEND Release 7.0 Feature Reference page 105

MERLIN LEGEND Communications System Release 7.0
Feature Reference 555-670-110
Features
Allowed/Disallowed Lists
Disallow *67 only when it is followed by *69.
Default Disallowed Lists
In Release 3.1 and later systems, the system is factory-set with a default
Disallowed List (List 7), which includes the following entries: 0, 10, 11, 1809,
1700, 1900, 976, 1ppp976, * (p = any digit). This list is automatically assigned to
any port programmed as a Voice Messaging Interface (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. For Release 6.0 and later systems
(Hybrid/PBX mode only), it is recommended that the system manager
assign Disallowed List 7 to the Remote Access default COR for tie and/or
non-tie trunks.
Disallowed Lists and VMI Ports
In Release 3.1 and later systems, ports assigned as Generic VMI or Integrated
VMI are assigned the default Disallowed List.
!
SECURITY 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
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.
Issue 1
April 1999
45