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DEFINITYEnterpriseCommunicationsServerandSystem75andSystem85
Terminals and Adjuncts Reference
555-015-201
Issue 11
December 1999
Data Modules
21-61The Trunk Data Module (TDM)
21
The TDM can serve as part of a conversion resource for modem pooling. The
conversion resource performs the analog-to-digital and digital-to-analog
conversions that allow the analog and DCP data endpoints to communicate. A
single conversion resource consists of a modem and a TDM connected at the
RS-232-C interface.
NOTE:
The TDM can no longer be ordered. It has been replaced by the MTDM.
Physical Description
Features
Switches
The TDM is equipped with the following switches:
■ Originate/Disconnect — This switch is located on the front panel. It is used
when originating and disconnecting from a call for test purposes.
■ Self-Test — This switch is located behind the front faceplate. Pressing this
button performs the self-test.
■ LOC LOOP/REM LOOP — This switch is located behind the faceplate. It is
used to perform the Local loop test or Remote loop test.
■ Options — The option switches are located behind the front faceplate.
There are 30 option switches, 24 for options, and 6 spares.
Lights
The TDM is equipped with the following lights:
■ Power
■ Data Set Ready
■ Line Status
■ Call in Progress
■ Carrier on
■ Test in Progress
■ Check option
■ Tes t R e su lt
■ Send Data
■ Receive Data