AT&T MERLIN LEGEND Release 3.1 System Planning Manual page 229

Assigning Lines/Trunks to Data and Video Stations
On ISDN terminal adapter data stations, a personal line can be used to
make and receive outside data calls. To select the line/trunk for an
outgoing call, the caller dials the line/trunk number (801–880). 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, NI-1 BRI, or T1 Switched 56 (including T1-Tie lines using
Switched 56 service) facilities as personal lines.
Pool. Used when you want the voice and data station to make and
receive outside data calls on a specific trunk pool (for example, a pool
with PRI facilities) without dialing a dial-out code. The Pool button is used
to make and receive only outside calls. Automatic Line Selection should
be set to the Pool button in order to place calls on it.
NOTES:
1. Do not assign System Access Voice (SA Voice) buttons to data
communications equipment.
2. You must use PRI facilities with a digital data service such as
ACCUNET Switched Digital Service, a Software Defined Network
(SDN), T1 Switched 56 facilities, or NI-1 BRI facilities for digital data
calls.
3. T1 facilities that are not using Switched 56 service can be used for
modem data and analog 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 Hybrid/PBX mode and
are prerecorded on the Button Diagram on Data Forms 1a and 1b:
One System Access Originate Only (SA Orig Only) button and two
System Access Ring (SA Ring) buttons are assigned to all data
equipment connected to an 012, 016, or 008 OPT module.
One System Access Originate Only (SA Orig Only) button, one System
Access Ring (SA Ring) button, and a System Access Voice (SA Voice)
button are assigned to all data equipment connected to a digital
extension jack on an 008 MLX or 408 GS/LS-MLX module. Remove the
SA Voice button (see Form 5c, page 1).
The factory settings can be changed; however, the settings should be adequate
to meet most user needs, since System Access lines can be used to make both
inside and outside data calls. Each data extension must have at least one SA
button, or two SA buttons for making 2B Data calls. If making 2B Data calls with
two DFT/DPT buttons, you must also have two SA buttons.
If you want an ISDN terminal adapter data station to make and receive outside
data calls on a specific outside line/trunk, assign a personal line button. To
make calls on a personal line, set the Automatic Line Selection to that line.
Data Communications
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