I have one use on our PBX who has been experiencing seemingly random disconnects. The user is on the same LAN as everyone else, using the same type of phone (79XX loaded with SIP firmware) as everyone else. He had some disconnects a few weeks ago, I suspected the phone, so I swapped his with mine. I have since not had issues with his old phone, however, he has had issues using mine. So, the problem seems to be not with the phone, but with his station. I started thinking maybe the cable is bad. I checked the network stats on his 79XX, and never see any receive errors - perfect network performance. Also, the CLI has no indication of an error whenever a disconnect occurs, it just looks like a normal hangup of the Zap channel (TDM400P). The ONLY difference between this user and everyone else is his extremely loud talking. When I run ztmonitor it is obvious that he simply pegs the meter. Either it reads peaked out or silence, whether he is speaking or being quiet. Is it entirely possible that he is driving the Zap channel so hard that it either hangs up or causes the telco CO to hang up the channel? Is there something else I should look at that might indicate what the problem is? I am kinda pulling my hair out on this one, any help or suggestions would be appreciated. Sincerely, Brent A. Torrenga brent.torrenga@torrenga.com Torrenga Engineering, Inc. 907 Ridge Road Munster, Indiana 46321-1771 219.836.8918x325 Voice 219.836.1138 Facsimile www.torrenga.com
Francesco Peeters (Asterisk)
2006-Feb-15 14:45 UTC
[Asterisk-Users] Random Disconnects - or ARE they?
On Wed, February 15, 2006 22:35, Brent Torrenga said:> I have one use on our PBX who has been experiencing seemingly random > disconnects. The user is on the same LAN as everyone else, using the same > type of phone (79XX loaded with SIP firmware) as everyone else. He had > some > disconnects a few weeks ago, I suspected the phone, so I swapped his with > mine. I have since not had issues with his old phone, however, he has had > issues using mine. So, the problem seems to be not with the phone, but > with > his station. I started thinking maybe the cable is bad. I checked the > network stats on his 79XX, and never see any receive errors - perfect > network performance. Also, the CLI has no indication of an error whenever > a > disconnect occurs, it just looks like a normal hangup of the Zap channel > (TDM400P). > > The ONLY difference between this user and everyone else is his extremely > loud talking. When I run ztmonitor it is obvious that he simply pegs the > meter. Either it reads peaked out or silence, whether he is speaking or > being quiet. > > Is it entirely possible that he is driving the Zap channel so hard that it > either hangs up or causes the telco CO to hang up the channel? Is there > something else I should look at that might indicate what the problem is? I > am kinda pulling my hair out on this one, any help or suggestions would be > appreciated. > >LOL... You could try to explain that he doesn't need to shout to the person on the other side, that the telephone transmits the sound by wire, and not by air, so he doesn't need to shout to be heard on the other side! ;-) But seriously, I am really curious whether there is a connection between voice volume and disconnects... Please do keep us informed... -- F Peeters PIII 450 - 1 GB - * 1.2 - BRIstuff 0.3.0 Pre 1 - Florz patch 2 Sweex HFC-PCI modes=2 sync_slave=2 timer_card=0 Cologne HFC-S pins #52, #54, #55 connected in parallel for synching. AMD Duron 1GHz - 1GB - * 1.2.1 2 Sweex HFC-PCI cards
Perhaps you can scale him back at the 79XX? Not only might it solve the problem, but I'll bet the people talking to him on the other end would appreciate it as well... On the Aastra 9133i, for example, you can provide gain settings in the (mac).cfg file. Bob McDowell -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Brent Torrenga Sent: Wednesday, February 15, 2006 3:36 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] Random Disconnects - or ARE they? I have one use on our PBX who has been experiencing seemingly random disconnects. The user is on the same LAN as everyone else, using the same type of phone (79XX loaded with SIP firmware) as everyone else. He had some disconnects a few weeks ago, I suspected the phone, so I swapped his with mine. I have since not had issues with his old phone, however, he has had issues using mine. So, the problem seems to be not with the phone, but with his station. I started thinking maybe the cable is bad. I checked the network stats on his 79XX, and never see any receive errors - perfect network performance. Also, the CLI has no indication of an error whenever a disconnect occurs, it just looks like a normal hangup of the Zap channel (TDM400P). The ONLY difference between this user and everyone else is his extremely loud talking. When I run ztmonitor it is obvious that he simply pegs the meter. Either it reads peaked out or silence, whether he is speaking or being quiet. Is it entirely possible that he is driving the Zap channel so hard that it either hangs up or causes the telco CO to hang up the channel? Is there something else I should look at that might indicate what the problem is? I am kinda pulling my hair out on this one, any help or suggestions would be appreciated. Sincerely, Brent A. Torrenga brent.torrenga@torrenga.com Torrenga Engineering, Inc. 907 Ridge Road Munster, Indiana 46321-1771 219.836.8918x325 Voice 219.836.1138 Facsimile www.torrenga.com _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Brent Torrenga wrote:> I have one use on our PBX who has been experiencing seemingly random > disconnects. The user is on the same LAN as everyone else, using the same >Brent, The last time I was having random disconnects, it turned out to be that I had busydetect=yes on my zapata.conf. I changed this to no and the issues went away. Doug
Brent Torrenga
2006-Feb-16 08:16 UTC
[Asterisk-Users] RE: Random Disconnects - or ARE they?
Doug, This sounds reasonably plausible. He just might be fooling the busy detect routine, kinda like how a female voice can trigger DTMF detection. Bob, Yeah, I will dig through the Cisco docs for a way to attenuate his mic... Good point. BTW: when editing zapata.conf, does a reload chan_zap.so make all changes effective, or do I need to reload or service asterisk restart? --Brent>Brent Torrenga wrote: >> I have one use on our PBX who has been experiencing seemingly random >> disconnects. The user is on the same LAN as everyone else, using the same >> >Brent, > >The last time I was having random disconnects, it turned out to be that >I had busydetect=yes on my zapata.conf. I changed this to no and the >issues went away. > >Doug
Brent Torrenga
2006-Feb-16 09:17 UTC
[Asterisk-Users] RE: Random Disconnects - or ARE they?
FOR THE LIST'S BENEFIT, THIS IS MY EMAIL TO THE LOUD PARTY ON OUR SYSTEM, THANKS FOR ALL YOUR HELP, HOPEFULLY I HAVE THE ISSUE SOLVED: ---------------------------------------- Well, I got a series of suggestions as to how to solve your hangup problem. My favorite suggestion:>LOL... You could try to explain that he doesn't need to shout to the >person on the other side, that the telephone transmits the sound by wire, >and not by air, so he doesn't need to shout to be heard on the other side! > ;-)That explanation is actually not far off base! Back in the day, before the telephone companies digitized their back-bones (the 70's maybe?), a phone call was actually made by temporarily creating a circuit of copper wire between the two handsets. This long length of analogue transmission introduced a certain amount of loss in the signal, depending on how far away the two endpoints were, how many switching stations were between them, etc. To overcome the loss of signal, or being heard as "too quiet", one would need to actually speak up to be adequately heard and to bring their voice over the line noise. Anyways, the consensus is that you are loud on the phone, and are scrambling the "busy detect" routine. The busy detect routine is a piece of code in the phone card drivers that tries to determine whether or not the phone company is playing a busy tone on the phone line. I am assuming that over-driving, or "clipping", the signal voltage does not allow for an accurate analysis of whether or not the sounds on the line are busy tones or not - that the system falsely determines that the line is indicating busy and then hangs it up. The transmit gain of the system could be attenuated so that you cannot peak the line, precluding this confusion in the system. However, doing so would cause all conversations to sound that much quieter to the other end of the line. I suspect it would result in people asking everyone (but you) to "speak up". I have disabled the system's busy detect function. I do not think that your network cable is faulty, there is no indication as such. Let me know if the problem persists/goes away. Sincerely, Brent A. Torrenga brent.torrenga@torrenga.com Torrenga Engineering, Inc. 907 Ridge Road Munster, Indiana 46321-1771 219.836.8918x325 Voice 219.836.1138 Facsimile www.torrenga.com -------------------------------------------------
Alexander Lopez
2006-Feb-16 09:37 UTC
[Asterisk-Users] RE: Random Disconnects - or ARE they?
> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com > [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of > Brent Torrenga > Sent: Thursday, February 16, 2006 11:17 AM > To: asterisk-users@lists.digium.com > Subject: [Asterisk-Users] RE: Random Disconnects - or ARE they? > > FOR THE LIST'S BENEFIT, THIS IS MY EMAIL TO THE LOUD PARTY ON > OUR SYSTEM, THANKS FOR ALL YOUR HELP, HOPEFULLY I HAVE THE > ISSUE SOLVED: >Snip! One other thing that I did not mention, Are you using a PRI? What are your B-channel restarts set to??
Brent Torrenga
2006-Feb-16 10:07 UTC
[Asterisk-Users] RE: Random Disconnects - or ARE they?
Andrew: Yeah, busydetect=yes == problems. Duly noted! Alexander: Sorry, not a PRI line, just a TDM400P. Would a PRI or BRI not use the D channel to signal busy, anyways? I have a lot to learn about the workings of ISDN...>One other thing that I did not mention, Are you using a PRI? What are >your B-channel restarts set to??Sincerely, Brent A. Torrenga brent.torrenga@torrenga.com Torrenga Engineering, Inc. 907 Ridge Road Munster, Indiana 46321-1771 219.836.8918x325 Voice 219.836.1138 Facsimile www.torrenga.com
Maybe people are just hanging up on him cause he is talking to loud. Doug Lytle wrote:> Brent Torrenga wrote: > >> I have one use on our PBX who has been experiencing seemingly random >> disconnects. The user is on the same LAN as everyone else, using the >> same >> > > Brent, > > The last time I was having random disconnects, it turned out to be > that I had busydetect=yes on my zapata.conf. I changed this to no and > the issues went away. > > Doug > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > >
Having followed this thread, it seems to me that the simplest way to test for the busydetect hangup is to get the guy to make a few phone calls on someone else's phone. If the hangup happens, then it's the guy. If it doesn't, it's his station. -----Original Message----- From: Michael Sampson [mailto:msampson@yourccsteam.com] Sent: Thursday, February 16, 2006 2:42 PM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Random Disconnects - or ARE they? Maybe people are just hanging up on him cause he is talking to loud. Doug Lytle wrote:> Brent Torrenga wrote: > >> I have one use on our PBX who has been experiencing seemingly random >> disconnects. The user is on the same LAN as everyone else, using the >> same >> > > Brent, > > The last time I was having random disconnects, it turned out to be > that I had busydetect=yes on my zapata.conf. I changed this to no and > the issues went away. > > Doug > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > >_______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users