I suspect they are data, voice, or video jacks. Found in a conference room for a building from the 80s-90s. It’s the same wall as the TV. There’s also other existing RJ45 Cat 5 ports.

  • RustyShackleford@piefed.social
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    2 days ago

    They match the style of proprietary A/V control system ports used in 1990s conference rooms, Projector control interfaces, Crestron / AMX / Extron wall plates, RS-232 or RS-485 wiring inside custom housings.

    They were used to connect Projector control panels, Motorized screens, Audio/video switchers, Touch panels, Old teleconferencing gear.