same purpose as the cover assembly in unit 1. The
UNIT 2.-- Unit 2 (fig. 5-27) is similar to unit 1
except that the call-signal station has a front-crank
audible alarm component houses an electrical horn for
hand ringing generator instead of a side-crank hand
remote audible signaling.
UNIT 3.-- Unit 3 (fig. 5-28) is a console-mounted
terminal station consisting of four separate components:
BCP console 3A1, hand-ringing generator 3A2, audible
Unit 4 is a standard sound-powered telephone
alarm BZ-240/WTC-2(V), and handset HS1. BCP
console 3A1 and hand ringing generator 3A2 serve the
Figure 5-27.--The TA-975/WTC-2(V) sound-powered telephone set, unit 2.