To set up your TDD Detector for Automatic
Loop Current Detection you must open the case
by removing the four screws in the bottom of
the case. Move Jumper J3 as follows:
This enables the circuitry to detect loop
current. Whenever the operator goes off-hook,
the TDD Detector will detect this loop current
and begin looking for a TTY call. When
connecting the operator's phone (Telephone)
and the telephone line (Line), be sure not to
reverse these connections on the back of the
TDD Detector.
1. Install the TDD Detector in a place that is
convenient for your operator.
You can place the operator's telephone on top of
the TDD Detector. The operator should be able
to reach the buttons on the front panel easily.
2. Connect the TDD Detector to the phone
line.
Use the modular telephone wire included with
your TDD Detector.
If you have a single phone line…
Plug one end of the modular phone wire into
7
Loop-current detect
installation
J3
TDD Detector card
showing Jumper J3
location.
From:
To:
Move the jumper
from the bottom two
pins to the top two.
