Administrator's Guide

Data Modules — general
Issue 5 October 2002 505555-233-506
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.
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 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 switch 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 phones and 602A1
CALLMASTER phones 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 switch 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 switch 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.