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MERLIN LEGEND Communications System Release 5.0
System Manager’s Guide
555-650-118
Issue 1
June 1997
Prior Releases: Features and Enhancements
Page xxiiRelease 3.1 Enhancements
Programmable Second Dial Tone Timer 0
The system manager can assign a second dial tone timer to lines/trunks, in order
to help prevent toll fraud (for example, when star codes are used). After 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 0
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 0
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 0
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 0
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.
SECURITYlALERT:
!
Before removing restrictions, it is strongly recommended that you read
Appendix A, ‘‘
Customer Support Information’’.
Default Facility Restriction
Level (FRL) for VMI Ports 0
The default Automatic Route Selection (ARS) FRL for VMI ports is 0, restricting all
outcalling.