About Data And Video Communications; Connectivity - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

About Data and Video Communications

About Data and Video
Communications
This section provides a high-level overview of the system's data and video
communications capabilities, followed by more detailed information about some
of the equipment and concepts introduced in this overview.

Connectivity

Data communications connectivity enables the system to share resources, as
well as to establish and manage connections between computers and other
data devices.
Video communications connectivity enables users to conduct personal or group
video conferences and to share data and applications (also known as Video
Collaboration).
The system control unit (hardware and software) in conjunction with other
external hardware devices provides data and video connectivity for the
following:
On-premises analog data stations
Connection to off-premises data stations by way of an analog line/trunk
(GS, LS, Tie, or DID), by way of a dedicated analog line/trunk, or by way
of a DS1 Digital Service Link providing emulated GS, LS, Tie or DID
trunks
On-premises ISDN terminal adapter data stations
Connection to off-premises digital data stations by way of a PRI, NI-1
BRI, or T1 Switched 56 facility (including T1-Tie trunks using T1 Switched
56 service).
Connections between two similar types of data stations
Connection between a digital data station (on a B-channel) and an
analog data station by way of 2-stage dialing through a modem/ISDN
terminal adapter pool. This configuration is not described in this book;
see application note, MERLIN LEGEND Communications System Modem
Pooling .
On-premises host computer access
Local area network (LAN) access by way of a modem or ISDN terminal
adapter connected to an RS-232 port on a workstation on the LAN
On- and Off-premises personal or group video systems by way of a
digital PRI, NI-1 BRI, or T1 Switched 56 facility (including T1-Tie trunks
using T1 Switched 56 service).
5–4
Data Communications