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Matrix: How do I utilize fewer Power Supplies per individual CCI-22 for partylines?

Matrix: How do I utilize fewer Power Supplies per individual CCI-22 for partylines?

Apr 06, 2019

By using the top DB-9 of a CCI-22 backplane for power only, and using the bottom for PL distribution to Party Lines, you can use one power supply for more than one PL, since the power on pin-2 does now yet have audio added to it's XLR line.
HOWEVER, termination must be jumped on the CCI-22 card (MAKE the jumper {top, or "A"}) and OFF on the power supplies.

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