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The Thelephone Switchboard Group AN/MTA-3 was together with the Thelephone Connecting and Switching Group AN~MTA-4 part of the AN~MTC-1(A). The MTA-3 contained three parallel switchboard positions

Major Components

As part of the AN/MTC-1:

1 Shelter S-179/MTA-3 (modified S-141/G)

3 Switchboard SB-249A/TTC

3 Telephone Set TA-312/PT

As part of the AN/MTC-1A:

1 Shelter S-280B/G (modified), later called S-365/MTA-3B

3 Switchboard SB-1398/GTA

2 Telephone Set TA-312/PT

See Also