My specific issue has to do with ringing on my FXS ports. A Northen Telecom Harmony phone (circa 1983) rings normally but when I connect my newer GE 2.4GHz cordless I never get more than 1/2 ring (it lights up and works fine... just can't get a ring from it). Normally I'd assume that it's a low power issue on the FXS port but with a phone rated at 0.1 REM? I do have some strange voltages though.... ON-Hook: ~48V DC, 107V AC (this really concerns me...) Off-hook: ~6V DC, ~12VAC (where the hell is this AC component coming from???) Ring: 0V DC, ~45V AC Suffice it to say that electrically this is completely out to lunch... I'd like to throw an oscilloscope on the line to see what's what but I'm having trouble finding one. Thanks, Ian>>> radamson@routers.com 14/04/2005 10:14 >>>> > > I was following a discussion on this list about the TDM400P > > revisions. > > >It is my understanding that the current revision that one > > should have > > >is the Rev. H and not the E/F. I have not yet been able to > > verify the > > >rev stamped on the board, but zaptel is reporting that I > > have the Rev. > > >E/F. I just bought this card in January direct from Digium and was > > >wondering if I got the wrong Rev. > > >somehow?? I have been having some intermittent problems but only > > >thought it was my setup. > > > > > > > I did some more testing today. I called Digium on 4/12 and they > suggested some things to try, like different motherboard, switching pci > slots, etc.. I did everything they asked, except for the mother switch > as I do not have a different one to put in the system at this time. > > So, after all that, my ringing issue still persists. Too some > measurements from bot the card and my POTS line in both the on-hook > state and ringing state. I uses a digital multi-meter to make the > measurements on both. Here are the results.... > > TDM400P > > Before slot change: > > On hook idle: > > 43.8 Volts DC > 0 Volts AC > > Ringing: > > 0 Volts DC > 56.4 Volts AC > > After slot change: > > On hook idle: > > 48.7 Volts DC > 0 Volts AC > > Ringing: > > 0 Volts DC > 65.5 Volts ACWe can only assume the above represents a fxs module on the card. Correct? I would find it hard to believe that changing slots would cause the on hook DC voltage to change from 43v to 48v. That smells like a funcky voltmeter. Slots should have nothing to do with DC voltage unless the module is simply bad. The AC (ringing) voltage is reasonable, but again it should not have changed simply because of a slot change; again, questionable voltmeter.> On my POTS line: > > On hook idle: > > 43.8 Volts DC > .013 Volts AC > > Ringing: > > 50.5 Volts DC > 93.9 Volts ACThe on hook DC voltage from all US telco's will factually be in the 48v to 52v range. If their central office equipment produced 43 volts, they would have alarms going off all over the place. Their alarms would trigger somewhere in the 46 to 48 volt range. So, that measurement implies the voltmeter is not accurate. The AC (ringing) voltage is well within acceptable telco limits and can range from about 70v to upwards of 105v.> Could it bee that from the phone company they retain the DC offset > voltage while applying a ring frequency and as it appears on the TDM it > shuts off the DC offset when ringing starts. Could this be the issue > with those of us in the U.S. having ringing issues with the TDM's??Doubtful that is an issue. The reason for saying that is the chipset used on the fxo & fxs modules was manufactured by Silicon Labs, and those same chipsets are used in other telephony equipment worldwide. Silicon Labs is known for good to excellent products. If their chipsets didn't function correctly, there would have been a large uprising a couple of years ago when those chips were first produced. That hasn't happened, and they don't have a lengthy chip revision history. Asterisk code does not have any control over adding/removing the DC component during ringing, so that's not an issue either. Doubtful that adding/removal the DC component would have any impact on normal telephone sets, however there certainly could be funcky sets that don't like that DC removal. Given the number of postings relative to the TDM card lately, I don't remember exactly what your ringing issue was. Could you remind us without deleting the significant parts of the above? _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
On Thu, 14 Apr 2005 12:45:44 -0400 "Ian Pattison" <ianp@technologyassociates.ca> wrote:> My specific issue has to do with ringing on my FXS >ports. > > A Northen Telecom Harmony phone (circa 1983) rings >normally but when I connect my newer GE 2.4GHz cordless I >never get more than 1/2 ring (it lights up and works >fine... just can't get a ring from it). Normally I'd >assume that it's a low power issue on the FXS port but >with a phone rated at 0.1 REM? > > I do have some strange voltages though.... > > ON-Hook: ~48V DC, 107V AC (this really concerns me...) > Off-hook: ~6V DC, ~12VAC (where the hell is this AC >component coming from???) > Ring: 0V DC, ~45V AC > > Suffice it to say that electrically this is completely >out to lunch... I'd like to throw an oscilloscope on the >line to see what's what but I'm having trouble finding >one. > > Thanks, > > IanThe one test I did not look at was off hook scenario. I will try that tonight. I am also going to call a friend of mine now and see if he has a line tester I can borrow to accurately measure the voltages.
I don't know how everyone else is doing but my woes are continuing. I'm really starting to dislike these Digium cards. Hardware: Digium TDM400P (REV G according to the silk screening on the board) 2xFX0, 2xFXS purchased in August/September 2004 Dell Precision 420 (PIII-733, 512MB RAM nothing fancy but not doing too much either) Software: Zaptel, Libpri and Asterisk (v1-0) downloaded and re-compiled from CVS today (April 17) SuSE 9.1 (Kernel 2.6.4-52-default) configured as a life-support system for Asterisk only... no other apps running. Here's are my issues: 1. dmesg reports the card as Revision E/F although Rev G visually confirmed (see below) Zapata Telephony Interface Registered on major 196 PCI: Found IRQ 11 for device 0000:03:05.0 PCI: Sharing IRQ 11 with 0000:00:1f.3 Freshmaker version: 71 Freshmaker passed register test Module 0: Installed -- AUTO FXO (FCC mode) Module 1: Installed -- AUTO FXO (FCC mode) Module 2: Installed -- AUTO FXS/DPO Module 3: Installed -- AUTO FXS/DPO Found a Wildcard TDM: Wildcard TDM400P REV E/F (4 modules) 2. Low ringing voltage still (~44V AC). I have used the boostringer=1 option when loading wcfxs, did I miss something at compile time? 3. Rogue on-hook 109V AC voltage (11V AC off-hook) on both FXS ports. I have conformed that it is being generated by the card itself. I repeat, it is not being induced on the wire. After finding it a the wall jack I was able to sample the same 109V AC at the card itself with no cables attached. 4. Random calls dropped on the FXO ports from both FXS and SIP clients. The drop is usually preceded by a 2-3 second buzzing sound on the line. This occurs with both incoming and outgoing calls. It should be noted that the card is sharing an IRQ with another device (the USB controller to be exact). No matter what slot the card is inserted in it ends up sharing an IRQ. To that end I made sure it was sharing with an unused device (no USB devices attached). Looking for help here... Thanks, Ian
I don't know how everyone else is doing but my woes are continuing. Hardware: Digium TDM400P (REV G according to the silk screening on the board) 2xFX0, 2xFXS purchased in August/September 2004 Dell Precision 420 (PIII-733, 512MB RAM nothing fancy but not doing too much either) Software: Zaptel, Libpri and Asterisk (v1-0) downloaded and re-compiled from CVS today (April 17) SuSE 9.1 (Kernel 2.6.4-52-default) configured as a life-support system for Asterisk only... no other apps running. Here's are my issues: 1. dmesg reports the card as Revision E/F although Rev G visually confirmed (see below) Zapata Telephony Interface Registered on major 196 PCI: Found IRQ 11 for device 0000:03:05.0 PCI: Sharing IRQ 11 with 0000:00:1f.3 Freshmaker version: 71 Freshmaker passed register test Module 0: Installed -- AUTO FXO (FCC mode) Module 1: Installed -- AUTO FXO (FCC mode) Module 2: Installed -- AUTO FXS/DPO Module 3: Installed -- AUTO FXS/DPO Found a Wildcard TDM: Wildcard TDM400P REV E/F (4 modules) 2. Low ringing voltage still (~44V AC). I have used the boostringer=1 option when loading wcfxs, did I miss something at compile time? 3. Rogue on-hook 109V AC voltage (11V AC off-hook) on both FXS ports. I have conformed that it is being generated by the card itself. I repeat, it is not being induced on the wire. After finding it a the wall jack I was able to sample the same 109V AC at the card itself with no cables attached. 4. Random calls dropped on the FXO ports from both FXS and SIP clients. The drop is usually preceded by a 2-3 second buzzing sound on the line. This occurs with both incoming and outgoing calls. It should be noted that the card is sharing an IRQ with another device (the USB controller to be exact). No matter what slot the card is inserted in it ends up sharing an IRQ. To that end I made sure it was sharing with an unused device (no USB devices attached). Looking for help here... Thanks, Ian
> -----Original Message----- > From: Rich Adamson [mailto:radamson@routers.com]> > As far as the issue with DC voltage on the POTS line only > > being 43.8 DC, my guess was that is just an issue with > > voltage drop on the line because of distance between me > > and the CO. > > No possible way. If everything is truly on hook, there isn't > any current draw and therefore no way for a voltage drop to > occur. Basic ohm's law.If he's not using a high-impedance voltmeter, the meter might be loading the circuit down.
Ok... here's my module loading process... am I missing something? modprobe zaptel modprobe wcfxs boostringer=1 (btw: this one takes about 5 seconds. The others are almost instant) modprobe wcfxo ztcfg -vv This is correct is it not?>>> "Robert Webb" <asterisk@ropeguru.com> 18/04/2005 16:06 >>>See inline responses... On Mon, 18 Apr 2005 10:43:30 -0400 "Ian Pattison" <ianp@technologyassociates.ca> wrote:> 2. Low ringing voltage still (~44V AC). I have used the >boostringer=1 option when loading wcfxs, did I miss >something at compile time?The reason you are still seeing low ring voltage is due to the fact that the module is not using the boostringer when it is being loaded. If it were, you would see PCI: Found IRQ 14 for device 00:08.0 Freshmaker version: 71 Freshmaker passed register test Boosting ringinger on slot 1 (89V peak) Module 0: Installed -- AUTO FXS/DPO Module 1: Not installed Module 2: Not installed Module 3: Installed -- AUTO FXO (FCC mode) Found a Wildcard TDM: Wildcard TDM400P REV E/F (4 modules) Registered tone zone 0 (United States / North America) Notice the line in there about bossting the ringer to 89V peak. I am not seeing that in yours.
Hello, In FC3, i had to set wctdm options in /etc/modprobe.conf (it may be modules.conf in other distros): options wctdm boostringer=1 debug=1 Julian J. M. On 4/18/05, Ian Pattison <ianp@technologyassociates.ca> wrote:> 2. Low ringing voltage still (~44V AC). I have used the boostringer=1 option when loading wcfxs, did I miss something at compile time?
Hi, You could try disabling the USB in the BIOS setup to see if it stops sharing the interrupt. Regards, Neal -----Original Message----- From: Ian Pattison [SMTP:ianp@technologyassociates.ca] Sent: Sunday, April 17, 2005 6:52 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] TDM400P Revision question. I don't know how everyone else is doing but my woes are continuing. I'm really starting to dislike these Digium cards. Hardware: Digium TDM400P (REV G according to the silk screening on the board) 2xFX0, 2xFXS purchased in August/September 2004 Dell Precision 420 (PIII-733, 512MB RAM nothing fancy but not doing too much either) Software: Zaptel, Libpri and Asterisk (v1-0) downloaded and re-compiled from CVS today (April 17) SuSE 9.1 (Kernel 2.6.4-52-default) configured as a life-support system for Asterisk only... no other apps running. Here's are my issues: 1. dmesg reports the card as Revision E/F although Rev G visually confirmed (see below) Zapata Telephony Interface Registered on major 196 PCI: Found IRQ 11 for device 0000:03:05.0 PCI: Sharing IRQ 11 with 0000:00:1f.3 Freshmaker version: 71 Freshmaker passed register test Module 0: Installed -- AUTO FXO (FCC mode) Module 1: Installed -- AUTO FXO (FCC mode) Module 2: Installed -- AUTO FXS/DPO Module 3: Installed -- AUTO FXS/DPO Found a Wildcard TDM: Wildcard TDM400P REV E/F (4 modules) 2. Low ringing voltage still (~44V AC). I have used the boostringer=1 option when loading wcfxs, did I miss something at compile time? 3. Rogue on-hook 109V AC voltage (11V AC off-hook) on both FXS ports. I have conformed that it is being generated by the card itself. I repeat, it is not being induced on the wire. After finding it a the wall jack I was able to sample the same 109V AC at the card itself with no cables attached. 4. Random calls dropped on the FXO ports from both FXS and SIP clients. The drop is usually preceded by a 2-3 second buzzing sound on the line. This occurs with both incoming and outgoing calls. It should be noted that the card is sharing an IRQ with another device (the USB controller to be exact). No matter what slot the card is inserted in it ends up sharing an IRQ. To that end I made sure it was sharing with an unused device (no USB devices attached). Looking for help here... Thanks, Ian _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users