Avaya Communication Manager Administrator's Manual page 533

Detailed description of data modules
TTI allows data modules without hardware translation to merge with an appropriate data module
connected to an unadministered port. The unadministered port is given TTI default translation
sufficient to allow a terminal connected to the data module (connected to the port) to request a
TTI merge with the extension of a data module administered without hardware translation.
Note:
TTI is not useful for Announcement and X.25 hardware.
Note:
Administration Without Hardware supports PDM, TDM, Data-Line, Announcement, and X.25
data modules.
Note:
The 513 BCT has an EIA interface rather than a DCP interface (no built in data
Note:
module, attachable telephone, or telephone features). The 513 BCT is not
administered; only the data module to which the 513 BCT is connected is
administered.
7400A/7400B+/8400B+ Data Module
Use the 7400A data module instead of an MTDM when you support combined Modem Pooling.
The 7400A data module supports asynchronous operation at speeds up to 19200-bps, and
provides a DCP interface to the server and an EIA 232C interface to the associated modem.
The 7400A operates in stand-alone mode as a data module.
7400B+ and 8400B+ data modules support asynchronous-data communications and operate in
stand-alone mode for data-only service or in linked mode, which provides simultaneous voice
and data service. The 7400B+ and 8400B+ provide voice and data communications to 7400D
series telephones and 602A1 CALLMASTER telephones that have a connection to a data
terminal or personal computer. The data modules integrate data and voice into the DCP
protocol required to interface with the server via a port on a digital-line circuit pack. Use the
7400B+ or 8400B+ instead of an MPDM when you need asynchronous operation at speeds up
to 19.2-kbps to provide a DCP interface to the server for data terminals and printers. The
7400B+ and 8400B+ do not support synchronous operation and keyboard dialing. Dialing is
provided using the standard Hayes command set.
7400D
This data module supports synchronous operation with AUDIX, CMS, and DCS. It provides
synchronous data transmissions at speeds of 19.2-Kbps full duplex.
Data Modules — General
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