Hmmm, messengered cable would work. REMOVE the messenger for all but like 24" at the top. Separate the messenger from the cable for like a foot from the top end BUT DON'T CUT IT OFF. That foot of unmessengered cable is your loop that you put a plug on and plug into your ceiling mounted jack. Now, take that foot of separated messenger and loop it around a hook attached to the ceiling next to the jack. For the remaining messenger which is on the hanging cable, separate enough at the bottom to wrap it back around the cable and itself all the way up to where it separates from the cable at the top. This will keep it from separating on it's own.

This is really the same as what you would do when installing an aerial span to attach the cable to the supports. You would remove the messenger from the cable where it goes down the side of the building.

-Hal

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