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MERLIN LEGEND Communications System Release 7.0
Pocket Reference
555-670-116
Issue 1
April 1999
21
Release 3.1 Enhancements (March 1996)
■ Seven-Digit Password for SPM
Release 4.0 has increased system security by requiring a 7-digit
password for system managers or technicians who use System
Programming and Maintenance (SPM) to perform programming
or the Trunk Test procedure. This password is for use in
addition to a remote access barrier code.
Release 3.1 Enhancements (March 1996)
Release 3.1 includes all Release 3.0 functionality, plus the
enhancements listed below.
■ Call Restriction Checking for Star Codes
Beginning with Release 3.1, a system manager can add star (*)
codes to Allowed and Disallowed Lists to help prevent toll fraud.
Star codes, typically dialed before an outgoing call, enable
telephone users to obtain special services provided by the
central office. For example, in many areas, a telephone user
can dial *67 before a telephone number to disable central
office-supplied caller identification at the receiving party’s
telephone. You must contract with your telephone service
provider to have these codes activated.
When users dial star codes, the system’s calling restrictions
determine whether the codes are allowed. If they are allowed,
the system’s calling restrictions are reset, and the remaining
digits that the users dial are checked against the calling
restrictions.
■ Trunk-to-Trunk Transfer Set for Each Extension
This enhancement to the Transfer feature enables the system
manager to allow or disallow trunk-to-trunk transfer on a per-
extension basis. In Release 3.1 and later systems, the default
setting for all extensions is restricted.
■ Programmable Second Dial Tone Timer
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 central office 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 central office
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 central office is ready to
receive more digits from the caller.
■ Security Enhancements
The sections below outline security measures that are
implemented in Release 3.1 and later systems.