AT&T MERLIN LEGEND Release 3.1, Руководство по системному программированию

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Product Enhancements
1–58
Programming Basics
Release 3.1 Enhancements
Release 3.1 includes all Release 3.0 functionality plus the enhancements listed
below.
Security Features
New security features include a variety of components. Additional details are
included elsewhere in this book.
Call Restriction checking for star codes
Beginning with Release 3.1, the system manager can now 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 (CO). 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 MERLIN LEGEND system's Calling Restrictions
determine whether the codes are allowed. If 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 on a per-station basis
This enhancement to the trunk-to-trunk feature enables the system manager to
allow or disallow trunk-to-trunk transfer
on a per-station basis. Beginning with
Release 3.1, the default setting for all stations is restricted.
Programmable Second Dial Tone Timer
Beginning with Release 3.1, the system manager can now assign a second dial
tone timer to lines and trunks 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 the call being misrouted. The
second dial tone timer enables the system manger to make sure that the CO is
ready to receive more digits from the caller.
A Disallowed List containing numbers frequently associated with toll
fraud
Beginning with Release 3.1, Disallowed List #7 now 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 ports used
by voice messaging systems. The system manager must manually assign this
list to other ports.