Re: [Asterisk-Users] X100P noise on ADSL line.
WipeOut wrote: Following on from the message below I have discovered that the X100P causes the SNR on my ADSL line to drop even with the Asterisk box **switched off** and the power unplugged... This seems very strange.. Why should a card in a switched off PC cause noise on a line meaning that it drops out and has to reconnect quite often.. Anyone got any other ideas to try and stop it messing up my internet connection cos its causing havoc with my VoIP calls coming in and going out over the ADSL line.. Not really helpfull, but just so you'll know - I had a very similar problem with Digium bought X101P. Every time the card was connected to the microfilter the ADSl would drop dead. I managed to find another bloke with the same problem and had a few techn support emails with Digium but they could not help me. I tried replacing the microfilter, adding another filter, building a reverse filter (don't ask...) - nothing helped. Then we moved offices and it works great in the new office along side the ADSL. I have no idea why. There was just something in the old telco line that made it happen, I guess. Cheers, Gilad ___ 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] X100P noise on ADSL line.
Following on from the message below I have discovered that the X100P causes the SNR on my ADSL line to drop even with the Asterisk box **switched off** and the power unplugged... This seems very strange.. Why should a card in a switched off PC cause noise on a line meaning that it drops out and has to reconnect quite often.. Anyone got any other ideas to try and stop it messing up my internet connection cos its causing havoc with my VoIP calls coming in and going out over the ADSL line.. Later.. WipeOut wrote: Hi, This may be one for the broadband guru's out there.. I have a single analog line coming into the house.. This line is for my ADSL and home phone.. My Asterisk box uses an X100P card to connect to the analog line.. I have a microfilter on the line etc.. The rest of my phone system works inbound and outbound calls via a VoIP provider over the ADSL line.. The problem I am having is that the X100P seems to introduce a lot of noise on the line when it its connected to the phone socket on the microfilter and this causes the ADSL quality to drop quite badly.. When the X100P is not connected I have a signal to noise ratio of 29dB downstream and 30dB upstream (this stays the same when I connect an analog phone) when I connect the X100P the SNR drops to 12dB downstream and 30dB upstream.. At 12dB I get a large number of CRC errors and errored seconds on the ADSL connection.. Anyone got any ideas why the X100P would cause this kind of deterioration? Only thing I can think of is possibly something to do with ring detection or that its acting on some of the frequencies that are being used by the ADSL.. Thanks for any thoughts.. ___ 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 ___ 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] X100P noise on ADSL line.
HI, Had the same problem a while ago, X100p or a Modem caused the same problems as your getting. Changed the Microfilter and the problems went away. Tested the removed Microfilter and found the High pass filter was Knackered. Mine also showed the error with a phone connected as well but not as bad. Dave -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of WipeOut Sent: 26 October 2004 11:35 To: [EMAIL PROTECTED] Subject: [Asterisk-Users] X100P noise on ADSL line. Hi, This may be one for the broadband guru's out there.. I have a single analog line coming into the house.. This line is for my ADSL and home phone.. My Asterisk box uses an X100P card to connect to the analog line.. I have a microfilter on the line etc.. The rest of my phone system works inbound and outbound calls via a VoIP provider over the ADSL line.. The problem I am having is that the X100P seems to introduce a lot of noise on the line when it its connected to the phone socket on the microfilter and this causes the ADSL quality to drop quite badly.. When the X100P is not connected I have a signal to noise ratio of 29dB downstream and 30dB upstream (this stays the same when I connect an analog phone) when I connect the X100P the SNR drops to 12dB downstream and 30dB upstream.. At 12dB I get a large number of CRC errors and errored seconds on the ADSL connection.. Anyone got any ideas why the X100P would cause this kind of deterioration? Only thing I can think of is possibly something to do with ring detection or that its acting on some of the frequencies that are being used by the ADSL.. Thanks for any thoughts.. ___ 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 ___ 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] X100P noise on ADSL line.
Without getting too technical (because I can't), I have a similar configuration here without any problems. X100P connected to a POTS line which I only kept to carry ADSL. This allows me to dial 911. However, what may be unusual is the filter/splitter the ADSL installer left for me to use: It installs in the demarq box, so coming into the house I have two pairs, one for DSL, one for POTS. Both lines run UTP to the wiring closet in the basement, then more UTP to the office on the second floor. DSL is terminated into a Speedstream 5861 Router (sliced bread, move over). -Original Message- From: WipeOut [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 26, 2004 5:35 AM To: [EMAIL PROTECTED] Subject: [Asterisk-Users] X100P noise on ADSL line. Hi, This may be one for the broadband guru's out there.. I have a single analog line coming into the house.. This line is for my ADSL and home phone.. My Asterisk box uses an X100P card to connect to the analog line.. I have a microfilter on the line etc.. The rest of my phone system works inbound and outbound calls via a VoIP provider over the ADSL line.. The problem I am having is that the X100P seems to introduce a lot of noise on the line when it its connected to the phone socket on the microfilter and this causes the ADSL quality to drop quite badly.. When the X100P is not connected I have a signal to noise ratio of 29dB downstream and 30dB upstream (this stays the same when I connect an analog phone) when I connect the X100P the SNR drops to 12dB downstream and 30dB upstream.. At 12dB I get a large number of CRC errors and errored seconds on the ADSL connection.. Anyone got any ideas why the X100P would cause this kind of deterioration? Only thing I can think of is possibly something to do with ring detection or that its acting on some of the frequencies that are being used by the ADSL.. Thanks for any thoughts.. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/aster isk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ 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] X100P noise on ADSL line.
I have a single analog line coming into the house.. This line is for my ADSL and home phone.. My Asterisk box uses an X100P card to connect to the analog line.. I have a microfilter on the line etc.. The rest of my phone system works inbound and outbound calls via a VoIP provider over the ADSL line.. The problem I am having is that the X100P seems to introduce a lot of noise on the line when it its connected to the phone socket on the microfilter and this causes the ADSL quality to drop quite badly.. When the X100P is not connected I have a signal to noise ratio of 29dB downstream and 30dB upstream (this stays the same when I connect an analog phone) when I connect the X100P the SNR drops to 12dB downstream and 30dB upstream.. At 12dB I get a large number of CRC errors and errored seconds on the ADSL connection.. Anyone got any ideas why the X100P would cause this kind of deterioration? I suspect that it's not the X100P, but noise from your PC's power supply or motherboard. 1. With the X100P connected, cycle power to the ADSL modem so it renegotiates. If the noise is relatively narrowband, the noisy bins will be avoided and the SNR should improve. 2. Try two filters in cascade. Plug the new filter into the phone socket of the existing filter, and the X100P into the phone socket of the new one. 3. Try a long (25-foot or 50-foot) cord between the filter and the X100P. Try winding the cord into a coil about 8 inches in diameter. 4. Try a ferrite clamp-on core, such as those used to suppress noise in car stereo systems, around the cord from the X100P. If the core has a sufficiently large opening, make a two or three turn coil with the phone cord. 5. Try putting the X100P in a different PCI slot, so it is as far as possible from noisy boards such as video. Good luck, Stewart ___ 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] X100P noise on ADSL line.
Stewart Nelson wrote: I have a single analog line coming into the house.. This line is for my ADSL and home phone.. My Asterisk box uses an X100P card to connect to the analog line.. I have a microfilter on the line etc.. The rest of my phone system works inbound and outbound calls via a VoIP provider over the ADSL line.. The problem I am having is that the X100P seems to introduce a lot of noise on the line when it its connected to the phone socket on the microfilter and this causes the ADSL quality to drop quite badly.. When the X100P is not connected I have a signal to noise ratio of 29dB downstream and 30dB upstream (this stays the same when I connect an analog phone) when I connect the X100P the SNR drops to 12dB downstream and 30dB upstream.. At 12dB I get a large number of CRC errors and errored seconds on the ADSL connection.. Anyone got any ideas why the X100P would cause this kind of deterioration? I suspect that it's not the X100P, but noise from your PC's power supply or motherboard. 1. With the X100P connected, cycle power to the ADSL modem so it renegotiates. If the noise is relatively narrowband, the noisy bins will be avoided and the SNR should improve. 2. Try two filters in cascade. Plug the new filter into the phone socket of the existing filter, and the X100P into the phone socket of the new one. 3. Try a long (25-foot or 50-foot) cord between the filter and the X100P. Try winding the cord into a coil about 8 inches in diameter. 4. Try a ferrite clamp-on core, such as those used to suppress noise in car stereo systems, around the cord from the X100P. If the core has a sufficiently large opening, make a two or three turn coil with the phone cord. 5. Try putting the X100P in a different PCI slot, so it is as far as possible from noisy boards such as video. Good luck, Stewart Thanks for the suggestions.. I have tried another microfilter, the long cable and the cascaded microfilter and all made no difference at all.. I dont think it is the microfilter or the internal house cabling.. Also the fact that a standard analog phone doesn't do it also points to the X100P.. I can't move the X100P to another PCI slot because I only have two in this PC and the other has a TDM400P.. The only thing I could do is setup a completely new PC with Asterisk and go from there.. Guess this means that as usual I have bumped into a problem that no one else has (of knows they have :) ).. Later.. ___ 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] X100P noise on ADSL line.
I have tried another microfilter, the long cable and the cascaded microfilter and all made no difference at all.. I dont think it is the microfilter or the internal house cabling.. Also the fact that a standard analog phone doesn't do it also points to the X100P.. I can't move the X100P to another PCI slot because I only have two in this PC and the other has a TDM400P.. The only thing I could do is setup a completely new PC with Asterisk and go from there.. Guess this means that as usual I have bumped into a problem that no one else has (of knows they have :) ).. If you can't fix the noise problem, you may be able to tweak some DSL parameters to improve things. I'm on ADSL here in Paris, and my downstream noise margin is only 7 dB. But I believe that CRC errors cause me negligible VoIP impairment. Some stats: Router / modem uptime: 25 days Downstream speed: 7168 kbps CRC errors: 235 Packets received: 35,904,163 So, less than 1 in 100,000 packets lost because of CRC error. I'm sure that more are lost on the Net, or are delayed enough by jitter to not be played. I am quite happy with overall voice quality. How many CRC errors are you getting? Do you run in interleave or fast mode? At what speed? Is it correct that the X100P causes trouble even when it is on-hook and idle? If so, you could temporarily substitute an old analog modem; you wouldn't even have to configure it for use. If you have the same noise problem, you'd know it wasn't the X100P at fault. You might also try shorting tip and ring together (on the phone side of the filter) with the X100P connected. (Of course, your POTS line will appear busy during this test.) If you still have noise, it must be common mode (line to ground) and you can maybe filter it with a ferrite core, or by grounding your PC case. If the noise goes away in this case, and is also absent with the modem test, then I'd start to suspect the X100P as the source. Also, see if the noise gets reduced when the system has shut the monitor down, and the monitor is also turned off (log in via SSH from another machine). If your ADSL modem software can produce a graph or table of bits-per-bin, try comparing the results after negotiation with X100P, and after negotiation without X100P. --Stewart ___ 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] X100P noise on ADSL line.
Just for more info. I had to put 6 filters on a line for a customer with a X100P. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Stewart Nelson Sent: Tuesday, October 26, 2004 7:49 PM To: [EMAIL PROTECTED] Subject: Re: [Asterisk-Users] X100P noise on ADSL line. I have tried another microfilter, the long cable and the cascaded microfilter and all made no difference at all.. I dont think it is the microfilter or the internal house cabling.. Also the fact that a standard analog phone doesn't do it also points to the X100P.. I can't move the X100P to another PCI slot because I only have two in this PC and the other has a TDM400P.. The only thing I could do is setup a completely new PC with Asterisk and go from there.. Guess this means that as usual I have bumped into a problem that no one else has (of knows they have :) ).. If you can't fix the noise problem, you may be able to tweak some DSL parameters to improve things. I'm on ADSL here in Paris, and my downstream noise margin is only 7 dB. But I believe that CRC errors cause me negligible VoIP impairment. Some stats: Router / modem uptime: 25 days Downstream speed: 7168 kbps CRC errors: 235 Packets received: 35,904,163 So, less than 1 in 100,000 packets lost because of CRC error. I'm sure that more are lost on the Net, or are delayed enough by jitter to not be played. I am quite happy with overall voice quality. How many CRC errors are you getting? Do you run in interleave or fast mode? At what speed? Is it correct that the X100P causes trouble even when it is on-hook and idle? If so, you could temporarily substitute an old analog modem; you wouldn't even have to configure it for use. If you have the same noise problem, you'd know it wasn't the X100P at fault. You might also try shorting tip and ring together (on the phone side of the filter) with the X100P connected. (Of course, your POTS line will appear busy during this test.) If you still have noise, it must be common mode (line to ground) and you can maybe filter it with a ferrite core, or by grounding your PC case. If the noise goes away in this case, and is also absent with the modem test, then I'd start to suspect the X100P as the source. Also, see if the noise gets reduced when the system has shut the monitor down, and the monitor is also turned off (log in via SSH from another machine). If your ADSL modem software can produce a graph or table of bits-per-bin, try comparing the results after negotiation with X100P, and after negotiation without X100P. --Stewart ___ 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 ___ 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
