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Telecommunication outlet with conduit stub-up
The electrical contractor installs a 4" box, with a single-gang mudring, and runs a conduit from the box to the accessible ceiling space. The telecom installer can then run his wire after the drywall is complete, and not have to fish the wall. Also makes future changes possible.

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Multi-User Terminal Outlet Assembly
"MUTOA" - Generic term for an outlet with a bunch of outlets, usually put in a central area of a cubicle area, so everyone can run their line cords from their cube to the MUTOA.
https://images.google.com/images?hl=en&q=mutoa&btnG=Search+Images&gbv=2