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voip info asterisk questions (1 viewing) (1) Guests
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TOPIC: voip info asterisk questions
#1256
Rob (Visitor)
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voip info asterisk questions  
Hi all. Here is the scenario.  I may be moving abroad in the next few months, but I don't want to lose cheap phone calls!  I want to keep using 18866 and other suppliers.  This is my plan. 1) Setup a linux box to run asterisk 2) Buy an FXO card (2 X100P cards for £32 seems a bargain - http://www.goods2world.com/product_info.php?cPath=25&products_id=55) 3) Use a Sip phone through a router & broadband (approx 2mb connection) when I move abroad to connect to my asterisk computer. That way...my friends here can call me on a UK number (for most of them that will be a free call) which the Asterisk box connects to my IP phone abroad. Also, I get to make calls to the UK for 1p, and get very cheap international rates as well....potentially cheaper than using a local cable / phone company when I move. So, these are the questions. A - Is my understanding of this correct, i.e. will it work as I think it will? B - What sort of hardware will I need?  Could this be run on a p3 450Mhz with 128Mb RAM, or would I need something a little more powerful?  If so, how much more powerful? Please feel free to make any comments.  I have not yet experimented with asterisk, and am certainly not a linux expert, but I am happy diving into config files etc. Thanks for the help, Rob
 
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#1257
<i>ab...@wilson.st</i> (Visitor)
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voip info asterisk questions  
Please feel free to make any comments.  I have not yet experimented with asterisk, and am certainly not a linux expert, but I am happy diving into config files etc. Have a poke around on voip-info.org's Asterisk wiki (http://www.voip-info.org/wiki-Asterisk); their other VoIP info is also good. Zane.
 
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#1258
John Daragon (Visitor)
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voip info asterisk questions  
Hi all. Here is the scenario.  I may be moving abroad in the next few months, but I don't want to lose cheap phone calls!  I want to keep using 18866 and other suppliers.  This is my plan. 1) Setup a linux box to run asterisk 2) Buy an FXO card (2 X100P cards for £32 seems a bargain - http://www.goods2world.com/product_info.php?cPath=25&products_id=55) 3) Use a Sip phone through a router & broadband (approx 2mb connection) when I move abroad to connect to my asterisk computer. That way...my friends here can call me on a UK number (for most of them that will be a free call) which the Asterisk box connects to my IP phone abroad. Also, I get to make calls to the UK for 1p, and get very cheap international rates as well....potentially cheaper than using a local cable / phone company when I move. So, these are the questions. A - Is my understanding of this correct, i.e. will it work as I think it will? B - What sort of hardware will I need?  Could this be run on a p3 450Mhz with 128Mb RAM, or would I need something a little more powerful?  If so, how much more powerful? Yes, this should work. You may regret not having a static IP (for the asterisk box) if you don't have one at the moment. You can just configure the SIP phone as an extension on the asterisk box - set up as a SIP peer. Asterisk configuration isn't that bad. I can let you have some examples if you need them. I'm running a SipTone II and a HandyTone 286 as extensions at the moment and they work fine (although they're on my own network). The only things to watch are : 1) that the X100Ps (or the cheap WinModems in the ad) generate a lot of interrupts. Two may be a problem on a slowish box. 2) They don't support CLID, though there is a neat hack to modify a cheap external CLID box to generate serial input to the asterisk machine.   jd
 
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#1259
Peter Corlett (Visitor)
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voip info asterisk questions  
2) They don't support CLID, though there is a neat hack to modify a cheap external CLID box to generate serial input to the asterisk machine. THe X100P hardware can't detect the line reversal that precedes a burst of CLIP data, but somebody's written a hack so that Asterisk continuously monitors the line and records to a ring buffer and then scans that when the subsequent ring is detected. The main problem I have with the X100P is the horrendous echo it causes due to it having a mismatched impedance to the BT line. I suppose I should investigate echo-cancelling at some point.
 
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#1260
Ben Mack (Visitor)
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[...] 1) that the X100Ps (or the cheap WinModems in the ad) generate a lot of interrupts. Two may be a problem on a slowish box. It seems to work OK on a 500MHz Athlon. But I couldn't get it to work on what ISTR was a 400MHz machine (albeit with ISDN Billion cards), because of the interrupts However I've heard of someone running it on a Celeron 400 (again with ISDN Billion cards) - he warned:- 1) Disable any hardware you don't use in the BIOS, especially things like graphics card IRQs, parallel ports, serial ports etc. 2) Make sure each card is on its own, unshared, IRQ.  Each card will generate 8000 interrupts per second. Eek! HTH
 
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#1261
John Daragon (Visitor)
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voip info asterisk questions  
The main problem I have with the X100P is the horrendous echo it causes due to it having a mismatched impedance to the BT line. I suppose I should investigate echo-cancelling at some point. I've not experienced this myself. jd
 
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