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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
Data Modules
21-86The Multiple Asynchronous Data Unit (MADU)
21
The Multiple Asynchronous Data Unit
(MADU)
The MADU provides an RS-232-C compatible, full-duplex, asynchronous data
interface which provides host computer access for a variety of DTE devices. The
MADU converts information sent to it from a host computer in RS-232-C protocol
to low-voltage signals. These signals can be transmitted over standard building
wiring or to the switch over much greater distances than regular EIA signals may
travel. The host computer is set up to appear as a DCE device to the MADU. The
MADU sends the converted information out through its building wiring interface.
Capabilities
The MADU has the following data capabilities.
■ Speed — Standard data rates from 0.3 to 19.2 kbps and nonstandard data
rates below 1.8 kbps. The auto adjust option will automatically match the
transmission speed to the attached RS-232-C device.
■ Full-duplex
■ Asynchronous
■ Built in protection against voltage surges
Physical Description
Dimensions — stand-alone housing
NOTE:
The following dimensions are approximate.
Width = 8-3/4 inches
Depth = 12 inches
Height = 2-3/4 inches
Dimensions — multiple mount carrier
NOTE:
The following dimensions are approximate.
Width = 17-1/2 inches
Depth = 18 inches
Height = 8-3/4 inches