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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
407Data Modules — general
15
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.
7400C High Speed Link
The 7400C high-speed link (HSL) is a data-service unit that allows access to DCP
data services. It provides synchronous data transmission at speeds of 56- and
64-Kbps and provides a link to high-speed data networks. Used for Group 4 fax
applications that include electronic mail and messaging, and electronic storage of
printed documents and graphics. Use the 7400C for video teleconferencing and
LAN interconnect applications.
7500 Data Modules
The 7500 Data Module connects data-terminal equipment (DTE) or
data-communications equipment (DCE) to the ISDN network. The 7500 Data
Module supports EIA 232C and V.35 interfaces and RS-366 automatic-calling
unit interface (for the EIA 232C interface only).
The 7500 has no voice functions. Configure in the following ways:
■ Asynchronous DCE
300, 1200, 2400, 4800, 9600, 19200-bps
■ Synchronous DCE
1200, 2400, 4800, 9600, 19200, 56000, 64000-bps
■ Asynchronous DTE (used for modem pooling)
up to 19200-bps
The 7500 Data Module is stand-alone or in a multiple-mount housing.