TA-312 Field Phone
The TA-312/PT (and the earlier, similar TA-43/PT) may be used in a point-to-point wire system or in any two-wire ring-down subscriber position of a telephone communications system. The Handset H-60 contains a push-to-talk switch which connects power for talking. The TA-312/PT has a built-in Receptacle Connector U-79/U for use with the headset and an associated EXT-INT switch. The TA-43/PT does not have these features.
Telephone Set TA-312/PT with Handset H-60.
TA-312 Field Telephone Technical Characteristics
| Range wet: | Approximately 22.5 km (14 mi) on WD-1/TT (36 dB working limit) |
| Range dry: | Approximately 36.4 km (22 mi) on WD-1/TT (36 dB working limit) |
| Common Battery Operation | Voice transmission and signaling power supplied by switchboard |
| Local Battery Operation | Voice transmission power supplied by two BA-30s, signaling power supplied by a hand-crank generator |
| Common-Battery Signaling Operation | Signaling power supplied by switchboard, voice transmission provided by two BA-30s |
| Signaling (Outgoing) | Hand generated, 90 to 100 V AC, 20 Hz |
| Signaling (Incoming) | Audible tone, adjustable volume |
TA-312 Field Telephone Accessories
The TA-312 is supplied with a canvas case that closes with a brass zipper and has a shoulder strap for carrying or hanging the phone. The TA-955 dual tone multifrequency (DTMF) adapter allows push button operational interface with automatic analog switches. The TA-955 Touch Tone pad can be connected to the TA-312 with an integrated coupler and attachment point. The TA-312 also utilizes the G-42 crank generator and BZ3 clacker call signaler. It requires two BA-30 D-cell batteries.
Additional information regarding the TA-43/PT and the TA-312/PT field telephones:
| TA-43/PT | TA-312/PT | |
|---|---|---|
| Nomenclature | Telephone Set TA-43/PT | Telephone Set TA-312/PT |
| NSN | 5805-00-503-2775 | 5805-00-543-0012 |
| Manuals | TM 11-5805-256-13 | TM 11-5805-201-12 -20P -34P and -34 |
| Manufacturer | Western Electric | Various |
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