TM-9-2350-274-BD

M109/M110/M578 VEHICLES HOWITZER, MEDIUM, SELF-PROPELLED FULL-TRACKED

TECHNICAL MANUAL; OPERATORS, ORGANIZATIONAL DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

JANUARY 1984

TM-9-2350-274-BD - Page 149 of 219

TM 9-2350-274-BD

COMMUNICATIONS SYSTEM

b. Normal Intercom Operation with Crew Members Control Box.

See figure 11-2.

Figure 11-2. Crew Members Control Box

1. Place the MONITOR switch in the desired position.

(a) ALL - Receives all radio and intercom transmission. Transmit on

primary radio and intercom.

(b) A - Receives primary radio and intercom transmission. Transmit on

primary radio and intercom.

(c) INT ONLY - Receives and transmits on intercom only. There are no

(d)

radio capabilities.

B - Receives secondary radio (if equipped) and intercom transmission.

Transmits on primary radio and on intercom.

(e) C - Receives third radio (if equipped). Transmits on third radio (if

equipped). With this switch position, the only crew member with

intercom capability is the crew commander.

2. Adjust the VOLUME control to a comfortable listening level.

11-3