Forrest, I will see if I can get the guys to try that just for grins, before we swap to a CMM. They were pretty tired today. they were on the tower for 9 hours.
Paul From: Af [mailto:[email protected]] On Behalf Of Forrest Christian (List Account) via Af Sent: Tuesday, October 07, 2014 5:15 PM To: af Subject: Re: [AFMUG] Problem with Sync and link speed on 310 foot run with ePMP APs I'd be curious if your experience was the same with say a cambium gigabit injector in there. Not quite Apples to apples but closer than a gigabit vs non gigabit injector. Midspan gigabit injectors definitely add some signal loss due to the Ethernet magnetics in the path. At least a couple dB. I've also noticed that certain surge suppressors are even more picky with the gigabit injectors. Not sure why. On Oct 7, 2014 2:30 PM, "Paul McCall via Af" <[email protected]<mailto:[email protected]>> wrote: Just wanted to give a heads up on our experience with our first run at trying ePMPs at this distance of cable run. We mounted 4 5 Ghz and 4 2.4 Ghz ePMP APs today (a retrofit from 100 series APs). We have an existing CMM Micro that has been at the tower for 5 or 6 years. We needed more ports with Sync so we attempted to use a Gigabit Syncinjector for the additional ports we needed. We put the 2.4 Ghz radios on the CMM and put the 5 Ghz on the SyncInjector. The CMM and the “LAN facing” ports on the Syncinjector, powered by the same 5 AMP/24v power supply that we use for CTM’s, plugged into a 2011 Mikrotik router. The CMM works flawlessly, providing 100Mbit connections and sync . The SyncInjector… not so much. Initially, the symptoms were that 1 of the APs would only connect 10 Mbit and 1 different one would not get Sync. We tried swapping know good (successful on the CMM) cables, changing ports on the SyncInjector to make sure we didn’t have cable or AP related issues etc. Eventually, we lost ability to do Sync on any of the APs, and 2 of the 4 will only do 10 Mbit. Tried it with both 100Mbit and Gbit ports on the 2011, in auto or static Speed/Duplex configs. No go. The cables being used were both Best-Tronics and Toughcable Carrier. All the toughcables were premade to the 300 feet and tested inhouse at Gigabit speeds (TIK to TIK tests) Going to have to climb again tomorrow with a second CMM to swapout for the SyncInjector. We normally have very good luck with SyncInjectors but at 300 feet distance with the Gigabit models, we couldn’t make it work in this application. Cambium had “advised us” that there may be abnormal challenges with 300 ft. of cable on the ePMP. Paul Paul McCall, Pres. PDMNet / Florida Broadband 658 Old Dixie Highway Vero Beach, FL 32962 772-564-6800<tel:772-564-6800> office 772-473-0352<tel:772-473-0352> cell www.pdmnet.com<http://www.pdmnet.com/> [email protected]<mailto:[email protected]>
