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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Data Communications
Page 5-34Assigning Lines/Trunks to Data and Video Stations
5
To allow the user at an ISDN terminal adapter data station access to the digital
network for making and receiving calls to outside digital data stations, assign PRI
facilities with digital data service such as ACCUNET Switched Digital Service and
Software Defined Network (SDN), NI-1 BRI, or T1 Switched 56 facilities to ISDN
terminal adapter data stations. If these facilities are not available, the ISDN
terminal adapter data station user can make calls over the regular analog
telephone network only by using a digital-to-analog modem pool, described in
application note,
MERLIN LEGEND Communications System Modem Pooling
.
NOTE:NOTE:NOTE:
PRI and NI-1 BRI facilities are also used for analog data and voice calls and
can be assigned to telephones to allow the voice user to make and receive
voice calls using these types of facilities.
The following line button assignments are factory-set for Key mode and are
prerecorded on the Button Diagram on Data Forms 1a and 1b. Two Intercom Ring
(ICOM Ring) buttons are assigned to the following:
■ Data equipment connected to an 012 T/R, 016 T/R, or 008 OPT module
■ All equipment connected to a digital extension jack on an 008 MLX or
408 GS/LS-MLX module
The factory settings can be changed; however, at least one ICOM button must be
assigned to each data station. To allow a user to make and receive outside data
calls, you must assign an outside trunk to the data station.
To dedicate a specific line to receive outside data calls, assign an outside
line/trunk to a data station, DHG, LAN workstation, or local host computer.
On a digital or analog data station, the user selects an outside line/trunk by dialing
the Idle Line Preference code (usually 9) on an ICOM button. On an ISDN
terminal adapter data station, the user can also select lines/trunks assigned to the
extension by dialing the line number (801–880) assigned to that outside line/trunk.
It is extremely important that the factory-set Idle Line Preference (the line to which
the user is connected automatically when going off-hook) not be changed. The
user must be connected to an intercom line to activate features such as Privacy or
to select an available outside line/trunk by dialing the Idle Line Preference code.
Planning Form Instructions 5
Using Form 2c, System Numbering: Line/Trunk Jacks as reference, record your
decisions for each data station on the Key mode Button Diagram of Data Form 1a
or 1b. If you want to assign outside lines/trunks to the data station, write the
telephone number (from Form 2c) of the outside line/trunk on the appropriate
button. For ISDN terminal adapter data stations, include the line/trunk number.