Instruction manual

MERLIN LEGEND/MAGIX toll fraud
Issue 9 May 2003
6-35
For example: *67 and 420 are two entries in an allowed list. If someone at an
outward restricted extension dials
*67 420-1234, the call succeeds. If the person
at the same outward restricted extension dial
*67 431-1234, the call fails (431 is
not in the allowed list). If the person at the same extension dials 420-1234, the call
succeeds. This type of processing also applies to disallowed lists.
■ Disallowed List 7 has a new default entry. Entry 9 has a value of “ppp976”
to support the 10-digit dialing available in Release 1.5. When you upgrade
from a MERLIN MAGIX Release 1.0 system or from a MERLIN LEGEND
system to a MERLIN MAGIX Release 1.5 system, you must add this new
entry to Disallowed List 7 during conversion.
A star code is a central office code used to perform a specific function, such as
*70 to disable call waiting.
Loop-start reliable disconnect 3
Disconnects signals on incoming calls on loop-start trunks are classified as one of
the following:
■ Reliable. A disconnect signal is sent to the system by the local telephone
company shortly after a caller hangs up. Loop-start trunks must be reliable
for remote call forwarding and trunk-to-trunk transfer. Also, reliable
disconnect is strongly recommended for remote call transfers, and VMSs
such as MERLIN LEGEND Mail.
NOTE:
If the local telephone company uses a short disconnect interval, do not
specify a reliable disconnect signal. Also, to ensure proper voice messaging
operation, and for private network systems, the system must have
ground-start or loop-start trunks with reliable disconnect.
■ Unreliable. A disconnect signal is not sent by the local telephone company
on every call.
**** SECURITY ALERT ****
Toll fraud can occur when loop-start lines/trunks are used with unreliable
disconnect. If the Legend user stays on the line after the called party hangs up,
the central office will return a dial tone at the conclusion of the call enabling the
user to place another call as if it were being placed from your company. This call
will not show up on SMDR. This overrides restrictions of the phone.
Since the disconnect signal on most loop-start trunks is unreliable, the factory
setting for the disconnect signal is
unreliable.
If you select
reliable disconnect, you can set the interval after which the line/trunk
is released.
Trunk-to-trunk transfer is programmed on a per-extension basis and should
remain disabled even if the loop-start trunk has reliable disconnect.