Lucent Technologies 555-661-140 Security Enhancements, Default Outward Restrictions for VMI Ports

MERLIN LEGEND Communications System Release 6.1	Issue 1
Installation 555-661-140	August 1998
Prior Releases Features and Enhancements	Page li
Release 3.1 Enhancements (March, 1996)

receiving certain digits dialed by a user, the CO may provide a second dial tone, prompting the user to enter more digits. If this second dial tone is delayed, and the user dials digits before the CO provides the second dial tone, there is a risk of toll fraud or misrouting the call. The second dial tone timer enables the system manager to make sure that the CO is ready to receive more digits from the caller.

Security Enhancements

The sections below outside security measures that are implemented in Release 3.1 and later systems.

Disallowed List Including Numbers Often

Associated with Toll Fraud

A factory-set Disallowed List 7 contains default entries, which are numbers frequently associated with toll fraud. By default, Disallowed List 7 is automatically assigned to both generic and integrated VMI (voice messaging interface) ports used by voice messaging systems. The system manager can manually assign this list to other extensions.

Default Pool Dial-Out Code

Restriction for All Extensions

The default setting for the pool dial-out code restriction (Hybrid/PBX mode only) is restricted. No extension or remote access user with a barrier code has access to pools until the restriction is removed by the system manager.

Default Outward Restrictions for VMI Ports

Ports assigned for use by voice messaging systems (generic or integrated VMI ports) are now assigned outward restrictions by default. If a voice messaging system must be allowed to call out (for example, to send calls to a user’s home office), the system manager must remove these restrictions.