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MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
Features and Applications
Page 4-45Features
4
In Behind Switch mode, calling restrictions must be supplied by the host system,
not by the MERLIN LEGEND Communications System.
In Release 3.1 and later systems, the system provides certain default calling
restrictions that make it easier for system managers to guard against toll fraud.
These are described below with the specific features they affect.
This section describes each type of calling restriction. Some of these features are
combined with security measures to prevent system abuse by remote access
users or hackers. In addition, users can be assigned authorization codes, which
they can enter when they are away from their extensions. When a person enters
an authorization code while visiting another system extension, the calling
restrictions assigned to his or her own extension are applied to the call. For more
information, see “Authorization Codes” on page 4–50
.
SECURITYlALERT:
!
For more information see the section, “Security” on page 4–51. Also consult
“Security of Your System: Preventing Toll Fraud,” in Appendix A, “Customer
Support Information.”
When you change your system, be aware of the following special considerations
that apply to toll calling:
■ The Remote Access feature allows employees to dial into the system by
dialing the number of a trunk designated for remote access. After a remote
access caller reaches the system, you should make sure that he or she
must dial a password (called a
barrier code
). After gaining access to the
system, the user can, among other things, select a regular or special-
purpose outside line (for example, a WATS line) or a pool or an ARS line to
make outgoing calls. You can apply calling restrictions to outside lines used
to access the system remotely; you can also apply restrictions to barrier
codes just as though they were system extensions.
■ Some voice messaging systems (described later in this chapter) permit
outcalling
. That is, these systems can be programmed to call an outside
number to deliver messages or faxes. This feature can be used for toll
abuse, so consider calling restrictions for lines used by such systems.
■ Remote Call Forwarding can be allowed or disallowed for your system. If
allowed, a user can have calls forwarded to an outside number. (This is not
permitted at extensions or on lines where calling restrictions have been
applied.)
■ When restrictions are applied to extensions, rather than to lines/trunks, a
person can ask a co-worker or operator with fewer restrictions to make a
toll call on his or her behalf.