2019年6月16日 · The TA-312/PT and the TA-43/PT are two-wire, battery-operated field telephones. They may be used in a point-to-point wire system or in any two-wire ring-down subscriber position of a telephone communications system.

This manual describes Telephone Sets TA-312/PT and TA-312A/PT and covers their installation, operation, and unit maintenance. It includes operation under usual and unusual conditions, cleaning and inspection of the equipment, and replacement of authorized parts for unit maintenance personnel. Unless otherwise indicated, wherever a reference to ...

Hand crank generates outgoing signal. Designed to have a dry operating range of over 20 miles when paired with U.S. G.I. Telephone Cable. Ideal for farm use, camp use, homestead, etc. Comes in original canvas case with strap and heavy duty brass zipper. Price includes only one field phone. Used condition.

The US signal corps field telephones TA-43/PT and TA-312/PT are nearly identical instruments. The only difference being that the TA-312/PT ads a plug which can be used to connect an external head-/chest-set or an external DTMF dialpad. The instruments are of very rugged construction and are splashproof.

The Telephone Set TA-312/PT is a two wire, battery-operated field telephone. It may be used in a simple point-to-point voice frequency (vf) wire communication link or in any two-wire ringdown subscriber position of a telephone communications system.

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2003年6月29日 · Replaced by the TA-838 which is the current (2003) analog field phone. These have been available surplus since late 1960. It uses 2 each BA-30 ("D") batteries when in the Local Battery (LB) mode. There is a canvas case with a shoulder strap that can also be used to hang the phone.

Small, rugged, water-proof, portable field telephone that was designed primarily for operation in the field on a local battery system. However, the telephone will also operate on a common battery signaling system.

The TA-312A/PT is a two-wire, battery-operated field telephone designed for robust voice frequency wire communications in field environments. It can function as a point-to-point communication link or integrate into a telephone system as a ringdown subscriber.

support of Telephone Sets TA-312/PT and TA - 312A/PT. Unless otherwise indicated, wherever a reference to TA-312/PT appears, the information also applies to the TA-312A/PT. It includes instructions for troubleshooting, testing, disassembly, assembly, and repair of the equipment. The functioning of the TA-312/PT is