[Asterisk-Users] Loop length supported by FXS module on Wildcat TDM400 card
Does anyone know (appoximately) the max loop length that the FXS module on a Wildcat TDM400 card will drive an analog phone(over standard - say cat3 or 26 gage twisted-pair wire). It's clearly not going to be 18kft, but perhaps 4000 feet? Thanks Elliot Eichen [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Loop length supported by FXS module on Wildcat TDM400 card
On Fri, 2004-05-14 at 16:12, Elliot Eichen wrote: Does anyone know (appoximately) the max loop length that the FXS module on a Wildcat TDM400 card will drive an analog phone(over standard - say cat3 or 26 gage twisted-pair wire). It's clearly not going to be 18kft, but perhaps 4000 feet? I'd be wary of 4kft even if it could do it. Thats a long way for something to short/introduce power and fry your complete computer. It would be pretty easy to put a cheap pc local and run a few feet of cable. This is especially true if you run more than one line. Considering the last time I priced cable, a 4000ft run would cost as much as the card or more, just put a machine local to that extension. -- Steven Critchfield [EMAIL PROTECTED] ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Loop length supported by FXS module on Wildcat TDM400 card
Steven Critchfield wrote: On Fri, 2004-05-14 at 16:12, Elliot Eichen wrote: Does anyone know (appoximately) the max loop length that the FXS module on a Wildcat TDM400 card will drive an analog phone(over standard - say cat3 or 26 gage twisted-pair wire). It's clearly not going to be 18kft, but perhaps 4000 feet? I'd be wary of 4kft even if it could do it. Thats a long way for something to short/introduce power and fry your complete computer. It would be pretty easy to put a cheap pc local and run a few feet of cable. This is especially true if you run more than one line. Shorts won't be a problem since any reasonably designed FXS interface has current limiting. In fact, it's this current limiting and the relatively low loop voltage (I'm guessing 24V on a card of this type) that will restrict usable loop length. As you point out, induced transients are also a problem. So if you have a long loop make sure you put telco surge arrestors on each end. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
