Hello, I am trying to solve a problem that I can foresee when I deploy Asterisk into a few SOHO situations soon. In Nebraska and in my area of Western Pennsylvania we have violent thunderstorms in spring and summer and sometimes very heavy wet snow in Winter. Both type of event will take out the power of a period of 30sec to 36-hours. So no UPS system would be able to handle a system for over an hour. So what I am wanting to build or buy is a device that when normal power is on and we have battery output on a FXS that the line dumb analog phone talks to asterisk, but when the UPS has shutdown and our phone system goes down, thus no battery signal on the line it switches that same dumb analog phone to the outside Analog trunk. This was the users can make and receive any emergency calls while the power is out. I have the basic concept of how this thing should work but not enough knowledge of telephone electronics to build it. I think this should be an essential part of any PBX that supports analog lines and would be willing to pay a reasonable price for it. Next sort of on the same topic. Does anyone have a diagram or know of some where you can buy a single or dual port Cisco power inserter. I want to put the Power Adapter for my 7960 over on the UPS so that the phone on my desk doesn't die right away when the power flickers or goes out. My battery a APC Back UPS Pro 650 holds the Asterisk server (Athlon 850 w/ 384 mb ram, X100P, Netgear FA311 10/100, Kinkston 10mb ne2k-pci clone, S3 Savage clone video, IBM 15GB, IBM 60GB, IBM 80GB IDE drives and four fans) Westtel DSL modem, Netgear 10mb hub (outside interfaces), Intel Pro 8-port managed switch (inside interfaces) for 25-30 minutes and that is usually enough for the power company equipment to reset around here. Thanks --- Shawn L. Djernes, N0PEU Djernes.org shawn@djernes.org | sdjernes@telerama.com | sdjernes@earthlink.net http://www.djernes.org PH: (412)-257-3252 519 Washington Ave. #2, Bridgeville, PA, 15017, USA -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20030713/e0c2769f/attachment.htm
Please understand that most mailing lists don't like HTML messages, and specifically when your chosen font size makes the text way to small to be read. The font size may be fine for your screen, but in the big wide world of the net you will find people who use bigger monitors and fonts tuned specifically for normal font sizes to be just readable at the normal sitting distance from their monitor. When your mailer adjusts the size to smaller than normal, it becomes a problem. On Sun, 2003-07-13 at 13:16, Shawn L. Djernes wrote:> Hello, > > I am trying to solve a problem that I can foresee when I deploy > Asterisk into a few SOHO situations soon. In Nebraska and in my area > of Western Pennsylvania we have violent thunderstorms in spring and > summer and sometimes very heavy wet snow in Winter. Both type of > event will take out the power of a period of 30sec to 36-hours. So no > UPS system would be able to handle a system for over an hour. So what > I am wanting to build or buy is a device that when normal power is on > and we have battery output on a FXS that the line dumb analog phone > talks to asterisk, but when the UPS has shutdown and our phone system > goes down, thus no battery signal on the line it switches that same > dumb analog phone to the outside Analog trunk. This was the users can > make and receive any emergency calls while the power is out.You can build a UPS for that, but the better option here is to attach a phone to the phone side of the X100P that is always connected to the POTS line so that even when the computer goes down you can send and receive calls.> I have the basic concept of how this thing should work but not enough > knowledge of telephone electronics to build it. I think this should > be an essential part of any PBX that supports analog lines and would > be willing to pay a reasonable price for it. > > Next sort of on the same topic. Does anyone have a diagram or know of > some where you can buy a single or dual port Cisco power inserter. I > want to put the Power Adapter for my 7960 over on the UPS so that the > phone on my desk doesn't die right away when the power flickers or > goes out. My battery a APC Back UPS Pro 650 holds the Asterisk server > (Athlon 850 w/ 384 mb ram, X100P, Netgear FA311 10/100, Kinkston 10mb > ne2k-pci clone, S3 Savage clone video, IBM 15GB, IBM 60GB, IBM 80GB > IDE drives and four fans) Westtel DSL modem, Netgear 10mb hub (outside > interfaces), Intel Pro 8-port managed switch (inside interfaces) for > 25-30 minutes and that is usually enough for the power company > equipment to reset around here.The specs are available on the net to show you how to wire POE (Power over ethernet). In fact I did my own so I can use the 7960 before we found a suitable wall wart. Basicaly all I did was punch down a keystone with the ethernet data lines, then punched down the power lines so that one side had power and the other didn't so I didn't chance blowing up my switch that was made before they thought of doing POE. I used the power supply from a CAC AB1 that had the ringer module broke on it. It produces 1amp of 48volts and was more than adequate for the 7960. If I had a lot of phones to power, I have a 6amp 48volt PSU from a Premisys channel bank that I picked up at a hamfest for $10. BTW, for the UPS, we have some powerware UPSs that have plugs for external batteries. In our former server room we have one with 5 car battery sized batteries attached to it. We feel we had about a 10 hour run time. -- Steven Critchfield <critch@basesys.com>
This power failure thing does not have to be complicated. A few solutions come to mind: 1) A 3,5,12 (whatever is needed) power supply (wall wart)used with a relay (DPDT). When the wall wart has power, the computer takes the call. When power fails, the POTS line "falls" in to place. Now, this does not "delay" while the computer is booting up. 2) A "basic stamp" computer - about $25-30. It has 8 programmable i/o pins that will drive relays. One pin monitors either a wall wart or 5v from one of the plugs on your computer's power supply. When pin 1 goes low (no power) relay kicks in to bypass computer and connect POTS line direct. When power returns program jumps to a "sleep" or delay statement for xMINS until computer boots. And then releases relay for "normal" operation. www.parallaxinc.com and resellers. James Taylor jltaylor@metrotel.net 903-793-1953 ---------- Original Message ---------------------------------- From: Steven Critchfield <critch@basesys.com> Reply-To: asterisk-users@lists.digium.com Date: 13 Jul 2003 17:35:55 -0500>On Sun, 2003-07-13 at 15:55, John Laur wrote: >> > You can build a UPS for that, but the better option here is to attach >> a >> > phone to the phone side of the X100P that is always connected to the >> > POTS line so that even when the computer goes down you can send and >> > receive calls. >> >> If you don't want it to ring *unless* the power is out, you could wire >> it through a normally-closed relay hooked to something simple like the >> parallel port (there are schematics everywhere for this). When the >> computer is off, the relay closes, and the phone rings with the line. >> Heck, if you have an analog set on FXS you want to ring when power goes, >> you could get a SPDT relay and wire one line into open and one line into >> closed and switch between them. If you don't care much about incoming >> calls during the outage, just plugging a phone into the other end of >> X100p and turning off the ringer will do the trick. > >It is easier to wire to a 12 volt(yellow) wire off of the PSU, plus this >lets you drive larger relays. > >> > The specs are available on the net to show you how to wire POE (Power >> > over ethernet). In fact I did my own so I can use the 7960 before we >> > found a suitable wall wart. Basicaly all I did was punch down a >> keystone >> > with the ethernet data lines, then punched down the power lines so >> that >> > one side had power and the other didn't so I didn't chance blowing up >> my >> > switch that was made before they thought of doing POE. I used the >> power >> > supply from a CAC AB1 that had the ringer module broke on it. It >> > produces 1amp of 48volts and was more than adequate for the 7960. If I >> > had a lot of phones to power, I have a 6amp 48volt PSU from a Premisys >> > channel bank that I picked up at a hamfest for $10. >> >> If you do this and plug anything other than the 7960 into it like a NIC >> you can easily damage it! (google for 'etherkiller' for more) Real power >> over ethernet injectors provide power only to devices that 'ask' for it, >> but for small setups they are very much more expensive than the price of >> a UPS that could power the 7960 for hours (a $30 ups running only the >> 7960 should go for at least a couple hours) - Compare this to paying >> $100+ per port for PoE injectors! Putting 'raw' 48V on the Ethernet in >> an office environment where someone else might accidentally plug >> something into the wall jack incorrectly would be a disaster! Of course >> there are some cost savings associated with not having to maintain and >> upkeep 48 UPS's for 48 phones that make PoE worth it, but I'd say that >> for less than 12 users it becomes harder to justify. > >etherkillers are 110 volts AC to data pins, POE is 48 volts DC on non >data pins. This should not blow devices that are not expecting PoE. >Think about it, how would a device ask for power if it doesn't have >power to make the request? > > >-- >Steven Critchfield <critch@basesys.com> > >_______________________________________________ >Asterisk-Users mailing list >Asterisk-Users@lists.digium.com >http://lists.digium.com/mailman/listinfo/asterisk-users >-- James Taylor jltaylor@metrotel.net 903-793-1953 --