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Digital Terminal Data Module (DTDM)
Lights
The DTDM is equipped with the following lights.
Terminal Ready
Call in Progress
Carrier On
Test in Progress
Check options
Receive Data
Send data
Test Result
Speed Indicator lights
The DTDM is equipped with seven indicator lights that show the speed at which the DTDM is
operating.
Switches
Speed selector switch
The thumbwheel speed selector switch (located behind the side cover) selects data rates of
LOW, 0.3, 1.2, 2.4, 4.8, 9.6, or 19.2 kbps.
Test switch
The Self-Test and Local Loop/Remote loop switches are located behind the side cover.
Option switches
The seven option switches are located behind the side cover.
Data Call Switch
The DTDM is equipped with a Data Call Switch labeled Originate and Disconnect.
Mounting Options
The DTDM is physically mounted to a 7403D or 7405D voice terminal. It attaches to the right
side of the voice terminal. The entire unit can be desk or wall mounted with one exception: if the
voice terminal is equipped with a Function Key Module, Call Coverage Module or Digital Display
Module and a DTDM, it cannot be wall mounted.
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