I’m actually having trouble negotiating GigE with some 450i APs on the bench right now using my laptop, short cables, and a Cambium 56V POE. The first one went OK, the next two the speed LED on the AP is either red (10Mbps) or off (???). If I connect it to a 100M device, or configure it to 10H/10F/100H/100F, everything is fine. But just connecting it to the GigE interface on my laptop, it doesn’t negotiate 100M, it flat out doesn’t work. I tried connecting it to a GigE Mikrotik port and got the same thing, so it’s not my laptop.
Note there is no Sync Injector or surge protector involved, just the Motorola official 450i POE. Has anyone else seen this? From: Wireless Administrator Sent: Friday, May 06, 2016 4:36 PM To: [email protected] Subject: Re: [AFMUG] Gigabit Ethernet on Cambium 450i only running 100Mbps It had HV on the back of it. I did send it back to Chuck for review Steve From: Af [mailto:[email protected]] On Behalf Of George Skorup Sent: Friday, May 06, 2016 3:33 PM To: [email protected] Subject: Re: [AFMUG] Gigabit Ethernet on Cambium 450i only running 100Mbps Is that a HV module? Would a non-HV module prevent GigE negotiation but still allow the radio to power up and run at 100Mb? On 5/6/2016 10:57 AM, [email protected] wrote: I will run it through its paces once I get it back. We have historically had lower clamp voltages and more greater sensitivity to surges and impulses than our competitors. That gives the equipment greater protection but it also causes problems when there is high noise or ground loops. One of the first support calls I ever got was from a guy trying to install one of our outdoor surge protectors in an attic and tying the ground to the ground wire in a nearby romex cable. Got them to put the thing outside the house and ground it to the house ground and it actually started working. But the surge suppressor itself could have issues too. Once in a while one gets through our process with a problem. From: Joshaven Mailing Lists Sent: Friday, May 6, 2016 9:54 AM To: [email protected] Subject: Re: [AFMUG] Gigabit Ethernet on Cambium 450i only running 100Mbps One possible difference is that your changing the impedance of the ground path. Try using the same wire to connect to ground and ground out the surge module… you may find that the issue is low impedance causing a ground loop to travel your cable. In that event the solution is to give the current a lower impedance path that isn’t through your cable or at least only on the shield of your cable. I use shielded patch panels before my surge modules and that creates a drain for the shield that has lower impedance (generally) then other paths. Ideally you would run a ground cable up your tower for all of your equipment that is large enough wire to be the best path to ground. Remember that this isn’t just about shorting grounds to the earth ground but you also have ground currents and static electricity created by wind etc that causes stray electricity that can interfere with your systems. Sincerely, Joshaven Potter Google Hangouts: [email protected] Cell & SMS: 1-517-607-9370 [email protected] On May 6, 2016, at 11:43 AM, <[email protected]> <[email protected]> wrote: And there is a reason.... When surge components clamp, they do so for a reason. From: Wireless Administrator Sent: Friday, May 6, 2016 9:16 AM To: [email protected] Subject: [AFMUG] Gigabit Ethernet on Cambium 450i only running 100Mbps Replaced This …… <image004.jpg> With This ……. <image005.jpg> On same ground point and got This …… <image010.png> :-) Except I want this to work ……. <image011.jpg> L Extra effort to ensure clear pictures and easy to read story line …… Steve From: Wireless Administrator [mailto:[email protected]] Sent: Friday, April 29, 2016 12:03 PM To: '[email protected]' Subject: Gigabit Ethernet on Cambium 450i We’re not able to get our Cambium 450i radio’s Ethernet Interface to run at Gigabit speed. Our setup is as follows: Gigabit switch (Tried several brands) à14’ Cat6 Patch àGigabit Sync injector (48V) à 35’ Best-tronics Cat5 Shielded à 800-800-GIGE-APC-HV à 80’ Best-tronics Cat5 Shielded à Cambium 450i It works without the 800-800-GIGE-APC-HV. (Cat5 Coupler). Anyone ………. Steve B.
