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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
Data Modules
21-3The 7400A Data Module
21
The 7400A Data Module
Figure 21-1. The 7400A Data Module
The 7400A Data Module is a full duplex asynchronous data module designed to
replace both the TDM (MTDM) and PDM (MPDM) for asynchronous applications.
The 7400A provides a DCP interface to the PBX and an RS-232-D (formerly
RS-232-C) interface to a DTE such as host computers, personal computers, and
terminals or DCE modems in external modem pool installation.
Applications
The 7400A data module can be used with the DEFINITY Communications System
Generic 1, Generic 2, and Generic 3, the DEFINITY ECS, System 75, and
System 85. It can be used in the modem pooling feature or for host access.
POWER/
DATA
7400A Data Module
DTR
RI
DCD
DTR
RTS
CTS
TD
RD
DSR
ENTER / YESBACKNEXT / NO
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