Expressroute 1000 Isdn Terminal Adapter - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Adjuncts
You can set up a terminal adapter to handle a variety of data terminal
equipment (DTE), including group videoconferencing systems and Group IV
(G4) fax machines. The ExpressRoute 1000 terminal adapter has dialing
capabilities. It does not allow the use of two B-channels for 112 or 128 kbps
data transfer (2B data).
Desktop videoconferencing and data-sharing applications have 2B data
capability built in, and some also allow the extension to include an MLX
telephone connected directly to the desktop video application. In this
configuration, the desktop video system can use both B-channels for 2B data
video calls, as long as the MLX telephone is not making or receiving a call. To
use 2B data, the MLX port must be programmed for this capability (see System
Programming for more information). The desktop video application can make or
receive a call using only one B-channel when the MLX telephone is on a call.
One B-channel is not adequate for video, but some desktop video applications
can switch to two channels once the MLX telephone is not on a call.
NOTE:
An extension jack programmed as a QCC position cannot be programmed for
2B data. Extensions for MFMs (or data communications equipment not
supporting 2B data) should not be programmed for 2B data.
For more details about data connections, see Data/Video Reference or contact
your AT&T representative. For more information about videoconferencing
equipment, see Chapter 5, "Putting the System to Work."
NOTE:
You cannot connect a modem or terminal adapter to a QCC.

ExpressRoute 1000 ISDN Terminal Adapter

An Integrated Services Digital Network (ISDN) terminal adapter connects a data
terminal to the system, so that a user can make and receive calls at an ISDN
terminal adapter data station . The ISDN terminal adapter maintains a digital
data format that allows transmission to another ISDN terminal adapter data
station in the system or over one of the high-speed digital facilities supported by
the system.
The ExpressRoute 1000 ISDN Terminal Adapter (or a compatible ISDN terminal
adapter) connects high-speed data terminal or video equipment to the system
for data transfer with an NI-1 BRI, PRI, or T1 Switched 56 facility. The
ExpressRoute 1000 ISDN Terminal Adapter supports speeds up to 64 kilobits
per second.
Summary
Table 3-5 contains a summary of the adjuncts.
3–40
System Components