------ Original Message ------ From: "Tony Kasule" <timotsmith at gmail.com> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com> Sent: 30/06/2015 8:34:47 p.m. Subject: Re: [asterisk-users] Help With Physical Layer>Hello, > >Anyone to help me with this issue? It has never worked :(Hi Tony I'm not familiar with the card you but 120 ohm is usually twisted pair, and 75 ohm is coax (usually). If it is changeable its usually done with jumpers on the card. I have used RAD modems before and their cable will have a specific pinout that you need to match. I doubt your digium card by default matches the pins, but maybe, and perhaps maybe your alcatel did. There will be a tx pair and an rx pair and you need to make sure they connect to the rx and tx pairs on the digium preferably with the same polarity. If you are getting no signal I would think its that. You can use a multimeter to check for voltage on the pins. Once you get that sorted another catch maybe timing. You will need to take E1 timing from one or other of the Telco's, with one as the primary source. If they for some reason aren't synced you will get errors every so often Good luck Cheers Duncan> >On Wed, May 20, 2015 at 11:34 AM, Tony Kasule <timotsmith at gmail.com> >wrote: >>Hello users, >> >>I have a Digium Te235 and asterisk 13 which have worked well with 1 >>carrier but we have failed to add a 2nd carrier. The second telco >>brings their E1 line over finer, terminated in a RAD modem and they >>give me ethernet to the E1 card. It's the first time i am having >>install such a solution, which ideally would be not a big problem. >> >>However, The physical layer has failed to come up! I have tried the >>same setup in an Alcatel OmniOCX and it works well. I can confirm that >>the port is also well configured because when I interchange the cables >>(with the exiting cable from the other telco), the alarm clears >>emmediately for the 1st telco and becomes RED for the 2nd telco. A >>loop also clears the alarm on both ports. >> >>The telco has told me to make sure that Line Impedance is 120 ohms but >>There's no where to set that and when I was reading, I was told that >>E1 is already 120 ohms so no need to change anything. >> >>Has anyone here experienced this? What other things can I try? >> >>Thank you! >> >>Regards, >>Tim >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20150630/7612fbae/attachment.html>
On Tue, Jun 30, 2015 at 2:15 PM, Duncan Turnbull <duncan at e-simple.co.nz> wrote:> > Hi Tony > > I'm not familiar with the card you but 120 ohm is usually twisted pair, > and 75 ohm is coax (usually). If it is changeable its usually done with > jumpers on the card. >The new Digium cards have no jumpers anymore and I don't think they support coaxial cables. The only changes we can make on the digium cards is to switch between E1/T1 modes and that's done when loading it in the kernel using modprobe.> I have used RAD modems before and their cable will have a specific > pinout that you need to match. I doubt your digium card by default matches > the pins, but maybe, and perhaps maybe your alcatel did. There will be a tx > pair and an rx pair and you need to make sure they connect to the rx and tx > pairs on the digium preferably with the same polarity. If you are getting > no signal I would think its that. You can use a multimeter to check for > voltage on the pins. >I would doubt it's the pinout but it's possible. I have tried several cables (cross-over, straight-through, E1) and both didn't work but surprisingly, they do on the other RAD modem that comes to the same PBX.> > Once you get that sorted another catch maybe timing. You will need to take > E1 timing from one or other of the Telco's, with one as the primary > source. If they for some reason aren't synced you will get errors every so > often >Thanks for the pointers. I am going to keep trying several things and if I get a break through, I'll definitely share the results. For no, any more help is welcome. thanks! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20150701/28854307/attachment.html>
<html><head></head><body style="background-color: rgb(255, 255, 255); line-height: initial;"> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Try to check CRC4, both hace to be the same</div> <div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);"><br></div> <div style="font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">Enviado desde mi smartphone BlackBerry 10.</div> <table width="100%" style="background-color:white;border-spacing:0px;"> <tbody><tr><td colspan="2" style="font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"> <div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in; font-family: Tahoma, 'BB Alpha Sans', 'Slate Pro'; font-size: 10pt;"> <div><b>De: </b>Tony Kasule</div><div><b>Enviado: </b>miƩrcoles 1 de julio de 2015 01:11 a.m.</div><div><b>Para: </b>Duncan Turnbull; Asterisk Users Mailing List - Non-Commercial Discussion</div><div><b>Responder a: </b>Asterisk Users Mailing List - Non-Commercial Discussion</div><div><b>Asunto: </b>Re: [asterisk-users] Help With Physical Layer</div></div></td></tr></tbody></table><div style="border-style: solid none none; border-top-color: rgb(186, 188, 209); border-top-width: 1pt; font-size: initial; text-align: initial; background-color: rgb(255, 255, 255);"></div><br><div id="_originalContent" style=""><div dir="ltr"><br><div class="gmail_extra">On Tue, Jun 30, 2015 at 2:15 PM, Duncan Turnbull <span dir="ltr"><<a href="mailto:duncan@e-simple.co.nz" target="_blank">duncan@e-simple.co.nz</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div><span class=""> <div> </div></span><div><div><span> <div>Hi Tony</div> <div> </div> <div>I'm not familiar with the card you but 120 ohm is usually twisted pair, and 75 ohm is coax (usually). If it is changeable its usually done with jumpers on the card. </div></span></div></div></div></blockquote><div><br></div><div>The new Digium cards have no jumpers anymore and I don't think they support coaxial cables. The only changes we can make on the digium cards is to switch between E1/T1 modes and that's done when loading it in the kernel using modprobe.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div><span><div>I have used RAD modems before and their cable will have a specific pinout that you need to match. I doubt your digium card by default matches the pins, but maybe, and perhaps maybe your alcatel did. There will be a tx pair and an rx pair and you need to make sure they connect to the rx and tx pairs on the digium preferably with the same polarity. If you are getting no signal I would think its that. You can use a multimeter to check for voltage on the pins. </div> <div></div></span></div></div></div></blockquote><div><br></div><div>I would doubt it's the pinout but it's possible. I have tried several cables (cross-over, straight-through, E1) and both didn't work but surprisingly, they do on the other RAD modem that comes to the same PBX.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div><span><div> </div> <div>Once you get that sorted another catch maybe timing. You will need to take E1 timing from one or other of the Telco's, with one as the primary source. If they for some reason aren't synced you will get errors every so often</div></span></div></div></div></blockquote><div><br></div><div>Thanks for the pointers.</div><div><br></div><div>I am going to keep trying several things and if I get a break through, I'll definitely share the results.</div><div><br></div><div>For no, any more help is welcome.</div><div><br></div><div>thanks!</div><div><br></div></div></div></div> <br><!--end of _originalContent --></div></body></html>