- At the bottom 6 CV-425/U, in the middle manual telephone switchboard TH-22TG. Above the TH-22/TG a LS-147/FI Loadspeaker.
The AN/TGC-30 Teletypewriter Central Office terminated one duplex or two half-duplex, secure teletypewriter circuits. It also provided for switching 15-voice frequency teletypewriter lines by means of an SB-22/PT switchboard. Security was provided by TSEC~K7'S. It was used at division and corps levels.
2 Reperforator-Transmitters TT-76/GGC
2 Teletypewriters TT-98/FG
1 Telephone Switchboard SB-22/PT
3 Telegraph Terminals TH-22/TG
6 Telegraph-Telephone Signal Converters CV-425/U
1 Telephone Set TA-312/PT
2 Communications Security Equipment TSEC~KW-7
3 Air Conditioner
- TM 11-5815-361-14 (Google)