A couple of ideas for in-expensive AC power monitoring.... 1. The Canary Method. Take a busted radio, any device that can hold an ip address,. respond to pings, power it using AC, and use ping monitoring to determine loss of AC Power.
2 The Mikrotik Method (if your Model of MT has Voltage Monitor). If you are using a Mikrotik Router @ Site. Mikrotik Routers can be powered using two sources of Power. One on the DC Jack and other on POE (port1). By default it will use the power sources with the higher voltage as primary. Use this method to power the MT from AC power, as well as DC Power... There is a nice script ( http://wiki.mikrotik.com/wiki/Monitor_input_voltage_on_RB333/433AH ), that allows you to monitor the Voltage, and send email of a change in voltage is detected. 3. The GregSowell Method. Create an ethernet loopback plug using a small relay.. http://gregsowell.com/?p=2093 There are other more fancy devices that will give you alters too.. the above are the inexpensive versions... Regards. Faisal Imtiaz Snappy Internet & Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: [email protected] ----- Original Message ----- From: "Roger Howard" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Wednesday, May 8, 2013 10:14:25 PM Subject: Re: [WISPA] Portable Alternators? Alternatively, run your equipment on DC from an Iota DLS charger, which is constantly trickle charging some batteries. When the power goes out, it will run a lot longer because you're not converting (like a UPS) from DC coming out of your batteries to AC and then converting from AC back to DC again in a POE to power the radio. Just use DC to DC converters to get the different DC voltages you need to run your various equipment. Plug your generator into the Iota charger to power it. I bet you'll get clean DC out of it. Especially if a battery is plugged in, which I think will help smooth out the DC current. I haven't tested it, but we're using DC everywhere. Just don't have to use a generator since the battery backup lasts so long. I recently had a tower with 6 radios on it, which had two deep cycle marine batteries from walmart. Someone somehow left the breaker off after working on the site. It ran for 3 days directly off the batteries before going down. We now have to monitor each the site is being fed by AC or not. Haven't got around to that yet. Maybe some mFi will help with this. Except the single port mFi doesn't have ethernet. Cheers! Roger G5 Internet, LLC On Wed, May 8, 2013 at 3:29 PM, Blair Davis < [email protected] > wrote: Especially with those small, cheap 2-cycle, 800-1000W generators, a 200-400W light stabilizes it well. -- On 5/8/2013 1:27 PM, Joel Mulkey wrote: <blockquote> We've noticed that our cheap generators won't charge the UPSs back up without some extra load to stabilize things. To provide that load we include a 500w or 1000w halogen construction light with each generator kit. Plug the light in and the voltage stabilizes, which allows the UPS to kick back on to the line power. It also provides some nice lighting if it's at night. Joel Mulkey CIO Freewire Direct: 503-616-2557 | Support: 503-614-8282 http://www.gofreewire.com http://twitter.com/FreewireNetwork On May 8, 2013, at 10:17 AM, [email protected] wrote: <blockquote> This is the third time in about two years that we've had some major power outages across our region due to the supplier lines going down. Every time the situation is the same, We roll out our portable generators to a few of our smaller sites that don't have full-time generators -- and every time we have to fight with them to get clean power out of them -- usually just ending up putting equipment directly on the generators and bypassing the UPS systems. I've seen the generators go everywhere from 40Hz to 90Hz. Has anyone come across a nice portable alternator (as opposed to a generator) that can be taken to tower sites as supplementary power? ~ Matt _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless </blockquote> -- West Michigan Wireless ISP Allegan, Michigan 49010 269-686-8648 A Division of: Camp Communication Services, INC _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless </blockquote> _______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
_______________________________________________ Wireless mailing list [email protected] http://lists.wispa.org/mailman/listinfo/wireless
