Lorell, My last knowledge of the ePMP product was that it did not support 56V via a CMM4. I think you will need the 29V power supply for the CMM4 if you want to use ePMP. Best, Jonathan Mandziara -------- Original message --------From: Lorell Hathcock <lor...@solstarnetwork.com> Date: 10/3/16 3:42 PM (GMT-06:00) To: 'WISPA General List' <wireless@wispa.org> Subject: [WISPA] Cambium ePMP 1000 w/ CMM4 power supply power recommendation needed All: First of all, is this the correct list to ask this question? If it is not, please direct me to the correct list. Here’s the real question: Background I have a new tower to install. There is no equipment on the tower yet. The tower is 1000 ft tall, buy I will be mounting equipment at 200 ft. There is a 100 ft bridge from the base of the tower into the head end where my cabinet is located. 200 ft + 100 ft = 300 ft I will mount 6 x ePMP 1000 on 3 x KP Performance antennas.I have a CMM4 to mount on the tower as well. The CMM4 will provide timing and power to the 6 x ePMP 1000’s.I have a 1500 kva UPS in my cabinet in the Tower headend that I want to use to provide back up power to the CMM4 and the 6 x ePMP 1000s. Questions What should my power supply solution be for the CMM4? It came with a 120 VAC to -56 VDC power supply, but I am flirting with the distance limitation of 330 ft for the Ethernet, so I will just run fiber up the tower to the CMM4 and solve that problem, but what about my power? How do I size the wire, whould I try to push -56 VDC power up the tower or am I better trying to get 120 VAC up the tower? If I get 120 VAC up the tower, how can I put that on my UPS? Any ideas on my wire gauges? Thanks in advance! Lorell Hathcock
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