4.
TA-838/TT telephone set
Status: STD-A; NSN: 5805-00-124-8678
General Information
The TA-838/TT is a rugged, solid-state field telephone designed for use with switchboards SB-3614/TT
and SB-3614/AT or with the tactical automatic switches AN/TTC-25, AN/TTC-38, AN/TTC-39, and
AN/TT-39A and is capable of compatible interoperation with TA-341/TT and C-6709 (NRI) equipment.
It is a 2- or 4-wire local or common-battery set using DTMF tones for signaling and will work with any
DTMF semiautomatic or automatic circuit. Using the TA-838/TT, up to three extensions may be added
in the 4-wire mode and only one extension may be used in the 2-wire mode.
Technical Characteristics
Range .................................................................................... 3.2 km (2 mi) from SB-3614/TT
under the worst conditions
Type of Operation ................................................................. Local or common battery
Signaling (Outgoing) ............................................................ 900 to 3400 Hz DTMF
Signaling (Incoming) ............................................................ 90 V AC, 20 Hz
Type of Signal .......................................................................Audible tone, adjustable volume
Power Requirement ...............................................................6 V DC (four BA-42s or BA-2042s)
Weight ...................................................................................3.6 kg (8 lbs)
1-9
SS 0029
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