Figure 5-31.--The TS-3687/WTC-2(V) telephone test set, unit 7.

The extension visual signal device (fig. 5-30)

provides a visual signal to a location remote from a

terminal station when additional signaling is required

due to high noise levels or physical barriers to sound

near a station. The extension visual signal device uses a

50-watt incandescent lamp.

Unit 7

Unit 7 (fig. 5-31) is used to test the terminal stations,

it has the capability of testing the continuity of the

station selector switches and associated wiring of the

terminal stations. The test set is a portable bench top unit

that mainly consists of an ON/OFF toggle switch, a

transformer, and 24 light emitting diodes to test the

continuity of the two station selector switches on the

terminal stations.

Unit 8

Figure 5-31.--The TS-3687/WTC-2(V) telephone test set,

unit 7.

Unit 8 (fig. 5-32) provides an audible signal to a

location remote from a terminal station when additional

SYSTEM OPERATION

audible signaling is required due to high noise levels or

physical barriers to sound near a terminal station. The

The system can be used to make point-to-point

audible alarm consists of an electrical horn mounted

(station-to-station) calls and conference calls. The

within the component. The audible alarm is also

system also provides net access, call holding, and

supplied as one of the components for unit 3.

executive override functions.

Point-to-Point Calls

Point-to-point calls can be made from any terminal

station to any other terminal station. To initiate a

point-to-point call, you should perform the following

procedures:

Figure 5-30.--Extension visual signal device.

Figure 5-32.--The BZ-240/WTC-2 (V) audible alarm, unit 8.