13. AN/MTC-1 and AN/MTC-1A manual telephone central office.
Status: STD-A; NSN: 5805-00-926-0255 (AN/MTC-1)
STD-A; NSN: 5805-00-167-7628 (AN/MTC-1A)
General Information
The AN/MTC-1 and -1A are air- or vehicular-transportable manual central offices which provide
switching for 196 local-battery or common-battery subscriber lines and 20 manual or dial trunk circuits.
The AN/MTC-1 and the -1A are each housed in two shelters-the AN/MTA-3 and the AN/MTA-4. The
MTA-3 contains three parallel switchboard positions. The AN/MTA-4 houses the relays, frames,
storage batteries, and power panel.
Major Components
AN/MTC-1
AN/MTC-1A
1 shelter S-179/MTA-3
1 shelter S-280B/G (modified)(MTA-3)
(modified S-141/G)
3 switchboards SB-1398/GTA
3 switchboards SB-249A/TTC
2 telephone sets TA-312/PT
3 telephone sets TA-312/PT
1 shelter S-280B/G (modified)(MTA-4)
1 shelter S-180/MTA-4
3 main distribution frames
(modified S-141/G)
TA-454/GTA-14
3 main distribution frames
2 line relays TA-452/GRA-14
TA-257/TTC
1 line relay TA-226/TTC
2 line relays TA-223A/TTC
1 power distribution panel
1 line relay TA-226A/TTC
SB-1399/GTA
1 power distribution panel
4 batteries BB-46
SB-1032/TTC
3 telephone sets TA-312/PT
4 batteries BB-46
2 intercommunications stations
3 telephone sets TA-312/PT
LS-147F/FI
Technical Characteristics
Power requirement ................................................................ 115 V AC, 50 to 60 Hz
Power Consumption ..............................................................7,556 W
Weight:
AN/MTA-3 ......................................................................... 2,038 kg (4,490 lbs)
AN/MTA-4.......................................................................... 1,970 kg (4,339 lbs)
Vehicular Requirement ......................................................... Two 2 1/2-ton trucks
1-19
SS 0029
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