With comments by Marcus Lindroos
The Moonbase Alpha travel units and living quarters have dedicated videophones. In addition to video calls, they are also used for important public announcements.
In Black Sun, the travel unit videophone broadcasts a message from Alpha News Service on one screen while the other displays a countdown times. This is the early Year 1 configuration missing some buttons.
By Missing Link, there are more buttons and labels. Koenig pushes the large red button between the screens to directly contact Main Mission.
In the Beta Cloud as well as most other episodes, there are three additional buttons below each screen.
Closeup of the right hand screen, from the Seance Spectre. In this episode, Sanderson starts and ends video calls with Command Centre by pushing the small buttons below the screen. Note "emergency procedure" instructions at left.
Space Warp: Carter contacts the launching area lobby (the destination of this travel unit) by pushing the rightmost red button. The same image is shown on both monitors. The screens are black and white only
Video phone booths are seen in corridors by travel tubes, but never used (they are usually immediately adjacent to a communications post).
All Year 1 and 2 Living Quarters are equipped with a wall mounted videophone. In Year 1, it is used only in Force of Life where Anton Zoref is woken up by a video message to remind him about his next duty period. Presumably it is re-recorded.
There is an illuminated control panel labelled "X3" which also appears in other Moonbase areas. The LQ videophone screens always display the same black and white image. In this scene from Dorzak Maya responds to Tony's call without pushing any buttons as the input microphone apparently is activated by her voice. However, this seems to be a user configurable function (in the Lambda Factor, Koenig pushes the button at top right to answer an emergency call from Dr.Russell).
There are apparently two sets of microphones/video cameras, one located near the screens and the other outside the living quarters entrance. In the Exiles, Helena responds to Koenig's request to enter her quarters by pushing the leftmost button. In the same episode, Koenig pushes the adjacent button to contact Command Centre.
Video calls can be transferred from one person to another. Sandra tells Tony that Koenig has landed. Tony presses the left "button" in the middle orange stripe and the screen switches to Koenig in Eagle One.
Like all other video devices, the LQ videophone is sometimes used for important announcements by the commander. Here, Koenig instructs all personnel to remain at their posts or in their quarters during the power transfer to the energy beam in Seed of Destruction.
Unusual screens used for close-up shots, particularly in Medical.
Copyright Martin Willey