Digital Data Calls - AT&T MERLIN LEGEND Release 4.0 Feature Reference

Feature Reference

Digital Data Calls

At a Glance
Users Affected
Mode
Factory Settings
2B Data
Description
The MERLIN LEGEND Communications System supports many options for high
speed digital data transfer over ISDN (Integrated Services Digital Network) and
T1 Switched 56, or between two extensions on the MERLIN LEGEND
Communications System. To transfer data you must have a terminal adapter or
compatible device connected to an MLX port.
NOTE:
For more information about digital data and 2B Data see the Data and Video
Reference .
The supported connections for making data calls are:
ISDN Primary Rate Interface (PRI)
ISDN Basic Rate Interface (BRI)
T1 Switched 56 lines
Primary Rate Interface
The ISDN (Integrated Services Digital Network) Primary Rate Interface (PRI) is a
standard access arrangement that can be used to connect the system to a
network providing voice and digital data services.
PRI is a standard access arrangement that uses a DS1 trunk to support
twenty-three 64-kbps data connections (known as B-channels) and one 64-kbps
connection (known as a D-channel) used to convey signaling information. For
more information see the Primary Rate Interface and T1 feature.
T1 Switched 56 Lines
A T1 trunk can be connected to the MERLIN LEGEND Communications System
to supply a number of data and voice services. Release 4.0 and later systems
can support one Switched 56 (56 kbps) data connection on each Digital Signal
Level 0 (DS0) channel of the T1 trunk. There are twenty-four DS0 channels on
Users with terminal adapters or desktop video systems only
Key, Hybrid/PBX
Disabled
165
Digital Data Calls