use these in the equipment room at the bottom of the tower: wbmfg.com GigE-APC-HV http://wbmfg.com/products.cfm?PID=61
they slide into this APC rack mount: http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=PRM24&gclid=CPXz8JWUh8ICFeRzMgod4DwA3w or into this DIN rail mount: http://wbmfg.com/products.cfm?PID=39 use shielded RJ-45 connectors on both ends of the cable and make sure that the drain wire is firmly connected to the outside shielding (you are suppose to solder to the shield but in my opinion that is impractical up on a tower and if you crimp the connection correctly then you'll be fine) fyi the shielded wire may not solve the CRC issue completely and you may need to run your cables inside shielded liquidtight conduit. also you may want to invest in a nice fluke tester to ensure that the cable and crimp are working properly. -sean On Wed, Nov 19, 2014 at 9:53 AM, Craig Schmaderer via Af <af@afmug.com> wrote: > Ok guys, I know this has been talked about a few times about FM towers. > We have a new site, that has about 20 cell phone antennas on it and maybe 8 > private band handheld radio antennas. We are seeing crc errors on all the > radios, not really effecting overall traffic, but I would like to fix it. > I have only used really good CAT5 cable for about 10 years now in my area > on all of our towers with great success. We never have lightning issues > unless it’s a direct hit and the radio blows up. What I am wondering is > that maybe when I used shielded cable 10 years ago to connect to cisco aps, > we always popped the ports on them. Granted I didn’t know much back then > and I don’t believe I had the shielded cable grounded right. So what I’m > asking, I assume the best way to fix this is with shielded cable. How do > most people setup the shielded run. So do I go into a chuck ground with a > shielded end connected to the drain wire at the bottom and then do I go > into a chuck ground at the top too? Or do I strip the jacket and ground > the shield to the tower? I guess I don’t want to just guess and loose > radios in lightning storms again, can someone let me know what great > results they have in the way they ground the run? Thanks, Criag. > > > > *Craig R. Schmaderer* > > *CEO | Skywave Wireless, Inc.* > > *Ph: 402-372-1975 <402-372-1975> | Fax: 402-372-1058 <402-372-1058>* > > *Direct: 402-372-1052 <402-372-1052>* > > >
