MERLIN LEGEND Communications System Release 6.1
Pocket Reference
555-661-116
Issue 1
August 1998
Page 17
Release 3.1 Enhancements (March, 1996)
■ No Transfer Return. When a handset bounces in its cradle, the
MERLIN LEGEND system interprets this as a switchhook flash
and attempts to transfer a call. This causes unintended ringing
at the user’s phone. In Release 4.0, a flash followed by an on-
hook state when a dial tone is present causes the call to be
disconnected.
■ Forward Disconnect. All ports on 012 (T/R) and 016 (T/R)
modules now send forward disconnect to all devices connected
to them when forward disconnect is received from the CO. This
is a non-administrable operation.
System Security
Greater system security is achieved by requiring a 7-digit
maintenance password when using SPM to perform remote
administration via the Remote Access Feature.
Release 3.1 Enhancements (March, 1996)
Release 3.1 includes all Release 3.0 functionality plus the toll fraud
and security enhancements listed below.
Star Codes
Star codes are dialable codes for services provided by the CO. The
user has to contract with the CO to get these codes activated.
With this release, users can now add a star (*) code to Allowed and
Disallowed Lists to help prevent toll fraud. The MERLIN LEGEND
system checks if the star codes are allowed. If allowed, the system
then checks the remaining dialed digits against the calling
restrictions.
As a security enhancement, *03 requires a technician to enter a
maintenance password to access test procedures.
Second Dial Tone Timer
Users can program a delay period (Second Dial Tone Timer) during
which no dialing is allowed. This is useful in cases when the CO
sends a second dial tone (such as after a star code); the user may
start dialing before getting the second dial tone, creating a risk of
toll fraud or misrouted calls. If the timer is programmed and dialing
is attempted during the delay, the call is not completed.
Trunk-to-Trunk Transfer
This feature allows or disallows trunk-to-trunk transfer on a per-
station basis. The factory setting for all stations is restricted
(disallowed).
Toll Fraud Factory Settings
This feature changes these factory settings:
■ No station or remote access user with a barrier code may dial
access to any pool.
■ Disallowed List 7 contains numbers most commonly abused for
toll fraud: 0, 10, 11, 1809, 1700, 1900, 976, 1ppp976 (p=any
number or character), *. Assign this list to extensions as
needed.
■ VMI ports are maximally restricted. Outward restriction is on and
they are assigned to Disallowed List 7.
■ FRL settings for VMI ports is 0, for local calls is 2, and for toll
calls is 3.
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