uses a variable number of 8 separate major units and
may contain up to 144 terminal stations.
PURPOSE OF UNITS
The eight major units of the AN/WTC-2(V)
sound-powered telephone system are as follows:
1. Unit 1--TA-974/WTC-2(V) sound-powered
2. Unit 2--TA-975/WTC-2(V) sound-powered
3. Unit 3--TA-976/WTC-2(V) sound-powered
4. Unit 4--G-15/A sound-powered telephone
5. Unit 5--H-200/U headset-chestset
6. Unit 6--J-3523/WTC-2(V) distribution box
7. Unit 7--TS-3687/WTC-2(V) telephone test set
8. Unit 8--BZ-240/WTC-2(V) audible alarm
Figure 5-25.--The TA-974/WTC-2(V) sound-powered
Units 1,2, and 3
telephone set, unit 1.
The terminal stations are units 1, 2, and 3. These
terminal stations provide the means of selecting and
calling other stations in the system.
UNIT 1.-- Unit 1 (fig. 5-25) is a bulkhead-mounted
terminal station consisting of three separate
components: call-signal station A1, handset HS1, and
handset holder MP1.
Call-signal station A1 consists of a cover assembly
and a case assembly. The cover assembly (fig. 5-26)
contains two single-pole, 12-position thumbwheel
station selection switches, a PLACE CALL/ANSWER
toggle switch, a side-crank dc hand-ringing generator
with related electronics, and an attenuator to adjust the
ring signal audio level. The case assembly is the housing
for the cover assembly and contains the necessary
terminal board and multipin connector to mate with the
plug on the cover assembly. The case assembly also
provides the means of connecting the handset.
Handset HS1 is a standard H-203/U sound-powered
Figure 5-26.--Call signal station A-1.
Handset holder MP 1 is a standard holder for the
H-203/U sound-powered telephone handset. The holder
is mounted near call-signal station A1.