The radio equipment consisted of microwave AN/TRC-29 transmitters, receivers and TCC-13 multiplexers (which normally provided for 23 voice channels). When two TCC-13 multiplexers operated together for greater circuit capacity (45 channels) the one that provided the first 23 channels was referred to the master multiplexer and the other was referred to as the slave unit. The other radio relay equipment consisted of VHF AN/TRC-24 and AN/TRC-36 systems. Each system had operational and backup equipment, although the backup equipment did not have their high voltages turned on till needed, they still generated a lot of heat (with just the filaments on) and noise from their cooling fans. The temperature was 110 degrees plus in the summer and the noise was always so loud you had to almost yell to speak to someone next to you. Capacitors would get hot enough to explode in the drawers, sometimes damaging components.

We would whistle certain tones to ring the Order Wire phones that we used to talk on with other stations. Instead of pushing a toggle button on the front of the radios it was easier to "whistle up" a frequency in the phone. The newest microwave equipment was the N.E.C. system. It was frequency modulated and carried something like 10,000 channels. Most of the work on it was handled by the Korean engineering technicians. The Control Room was the only quiet spot in the building.