CAPCOM
CAPCOM, or CAPsule COMmunications, refers to the astronaut or Mission Control staffer in charge of communications. The Habitat and Mission Control CAPCOMs communicate over a closed-circuit telephone system, which is the main audio link between the Habitat and MC supplemented by radio headsets as available. Buzzers are used to call a CAPCOM to the phone when their counterpart needs to contact them. In the Brahe, the CAPCOM phone is located on the Airlock side of the Interlock, while the Mission Control CAPCOM phone is located beside the CorelCam console.
Closed-Circuit Telephone Systems
A telephone junction box usually has four wires, of which the Green and Red wires carry content. If two telphones are wired in parallel with a power source, they will be able to communicate. This is the most basic CCTS setup, and was employed in the Brahe.
.--\/\/-.----. | | | - | |
--- [ ] [ ]
| | | ._______|____|
Where [] represent telephone jacks.
With appropriate voltage, this system could be scaled to any number of telephones wired in parallel.
