Mark, > APC SU700NET UPS
We currenly have been using Triplite inverters that do about 3500watt with 48V battery chains, for years. They work great, but all these units put out pulse modulated wave (modified sine wave) and do not provide smart remote monitoring via SNMP or WEB cards. As you know, if doing modified sine wave, you can not put after it another smart UPS, as it would detect the Pulse-modulated wave as a corrupt signal, noise, or disrupted power, triggering frequent switching to battery of the second inline UPS. Where this was an issue was if we served a rack, and one of our colocated clients, wanted to insert a small smart UPS to to monitor their power, and prevent against any mainteance outages that we might have with our battery testing or replacements. We were thinking of using a small 1U smart UPS, and removing the batteries, and installing to extermnal only batteries, as you suggested that you had done. However, there are concerns on whether these smaller units have adequate charging circuits to handle larger load of long run time battery chains. For racks, pbviously a high enough wattage/VA unit would be needed. Have you run into any limits of how many batteries you can connect, before overloading its charging circuits? Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Mark Nash" <[email protected]> To: "WISPA General List" <[email protected]> Sent: Wednesday, January 21, 2009 12:39 PM Subject: Re: [WISPA] We're being DDOS'd by DC! >I have several APC SU700NET UPS systems in place that we've taken out the > internal batteries and put in marine batteries on the floor. Depending on > what equipment it's powering, you can get 18-36 hours out of 2 batteries. > We also install a AP9617 SNMP card, that emails us of power events. We > were > having power sags on one mountain top. We tried telling the site owner > (Charter Cable) that they were having a problem. We got told "we're > looking > into it" for months, until I put THAT guy's email address in the SNMP card > notification list. Then, with the system nagging HIM as well, we got some > action. > > Mark Nash > UnwiredWest > 78 Centennial Loop > Suite E > Eugene, OR 97401 > 541-998-5555 > 541-998-5599 fax > http://www.unwiredwest.com > ----- Original Message ----- > From: "George Rogato" <[email protected]> > To: "WISPA General List" <[email protected]> > Sent: Wednesday, January 21, 2009 9:28 AM > Subject: Re: [WISPA] We're being DDOS'd by DC! > > >> You can buy inexpensive ups and use them. >> It's pretty windy here on the Oregon Coast, trees are always blowing >> over or limbs falling, so flickering lights is not uncommon. Not every >> power outage last for 10 hours. >> Most happen for a couple of hours. Or the lights flicker. Lights >> flickering is worse to me than the outage, especially when it's some >> wild voltage spike. Can't be good for our equipment. >> >> Marlon, some guys say they buy an inexpensive apc ups off ebay and hook >> them up to $100.00+ deep cell batteries. >> I have a few 3,000 watt offbrand ups that cost me about 350.00 or so. I >> have them scattered all over the place. I usually get about 10 to 12 > hours. >> >> George >> >> Marlon K. Schafer wrote: >> > Yeah. But they don't last forever. >> > >> > I've also found that they drain faster than they charge too. >> > >> > Right now I have rolling power outages in at least 4 towns spread out >> > by > a >> > good 80 miles via road. The power is on, then off then on then off. > It's >> > not like I can just got to town A and fire up a generator. >> > >> > Plus, these towns combine for a total of 11 sites! I don't have that > many >> > generators. >> > >> > Wanna know the funny part? In Wilbur, AT&T's cell tower has been down > more >> > than I have! grin >> > >> > People still had phone service most of the time. One of the cell phone >> > companies stayed up. If there was NO communications infrastructure in > place >> > I'd have worked harder to keep things running. Without help and a lot > more >> > generators/gas cans it just wasn't possible though. >> > >> > The weather is supposed to break today or tomorrow. I don't know how > long >> > it'll take to clean up all of the broken limbs etc. though. >> > >> > laters, >> > marlon >> > >> > ----- Original Message ----- >> > From: "George Rogato" <[email protected]> >> > To: "WISPA General List" <[email protected]> >> > Sent: Tuesday, January 20, 2009 9:22 PM >> > Subject: Re: [WISPA] We're being DDOS'd by DC! >> > >> > >> >> Don't you have battery back ups? >> >> >> >> >> >> Marlon K. Schafer wrote: >> >>> Looks pretty normal around here. But some of our towers are offline >> >>> again >> >>> due to all of the power outages. >> >>> marlon >> >>> >> >>> ----- Original Message ----- >> >>> From: "Eric Tykwinski" <[email protected]> >> >>> To: "'WISPA General List'" <[email protected]> >> >>> Sent: Tuesday, January 20, 2009 9:52 AM >> >>> Subject: Re: [WISPA] We're being DDOS'd by DC! >> >>> >> >>> >> >>>> Everyone on NANOG has been saying the same. We're actually seeing > close >> >>>> to >> >>>> triple on downloading today, starting about 9AM EST. >> >>>> Thankfully no issues on capacity at all on our end... >> >>>> >> >>>> I'm actually surprised the sites serving the videos aren't having >> >>>> any >> >>>> issues >> >>>> yet. >> >>>> >> >>>> -----Original Message----- >> >>>> From: [email protected] [mailto:[email protected]] > On >> >>>> Behalf Of David E. Smith >> >>>> Sent: Tuesday, January 20, 2009 12:46 PM >> >>>> To: WISPA General List >> >>>> Subject: [WISPA] We're being DDOS'd by DC! >> >>>> >> >>>> Not really, but is everyone else seeing lots of extra traffic from >> >>>> people >> >>>> streaming inauguration-related events in DC? My network is pulling >> >>>> basically >> >>>> double the traffic of a "normal" Tuesday. >> >>>> >> >>>> (There's a lesson about capacity planning in here somewhere...) >> >>>> >> >>>> David Smith >> >>>> MVN.net >> >>>> >> >>>> >> >>>> >> >>>>> ----------------------------------------------------------------------- > ----- >> >>>> ---- >> >>>> WISPA Wants You! 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Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------- > ------ >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.552 / Virus Database: 270.10.10/1906 - Release Date: > 1/21/2009 7:07 AM > > -------------------------------------------------------------------------------- WISPA Wants You! 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