I've had very poor results with the Digium cards, I am using a couple of the new Sangoma ones now (they are cheaper and have hardware echo cancellation).<br><br>The digium boards proved almost impossible to completely eliminate echo, and I had random failures over time.
<br><br><div><span class="gmail_quote">On 4/4/06, <b class="gmail_sendername">Steve Jones</b> <<a href="mailto:sjones@ftdata.com">sjones@ftdata.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
For phones, I've got a GS 101, a Sipura 841, and two analog phones hooked to an GS386 ATA (one phone per port).<br><br>My troubles seem to be regardless of which phone is used, so I dont think it's on the phone-end of asterisk, but rather where I interface w/ Vonage and Verizon via POTS FXO... My SIP connections to the outside world have so far been good [frantically knocking on wood]
<br><br>I did go ahead and order the digium card yesterday evening, so I'm hopeful this will help. I had played with the gain, and was able to discern a difference, but it seemed to make some scenarios better, while making others worse, so I'm hoping the real digium card/drivers will just be smarter about handling it dynamically. Of course, my wife, who's a stay-at-home-mom is the biggest user of the system, but she's not interested in being a techy, so getting her to interrogate all callers about which number they dialed, etc.. and logging her opinions of the quality of the call hasn't worked! ;-)
<br><br>I also have some Cisco phones, but I haven't configured SCCP on my system yet, and dont want to use SIP on these phone (mostly to force myself to learn to configure SCCP on *) so that's another aspect that may help me after this weekend!
<br><br>Good point about the interrupts - I dont know the answer to that, but hopefully that'll also be a non-issue after I get the new card, and therefore have only one PCI slot handling everything.<br><br>Thanks for the ideas!!
<br>-Steve<br><br><br>________________________________<br><br>From: Mike Dent [mailto:<a href="mailto:mcdent@gmail.com">mcdent@gmail.com</a>]<br>Sent: Mon 4/3/2006 3:46 PM<br>To: Asterisk Users Mailing List - Non-Commercial Discussion
<br>Subject: Re: [Asterisk-Users] Frustrated with echo...<br><br><br><br>On 4/3/06, Steve Jones <<a href="mailto:sjones@ftdata.com">sjones@ftdata.com</a>> wrote:<br>><br>> I've been using my Asterisk (At my house - 2 modem-type fxos, and an
<br>> assortment of SIP endpoints for phones) for about 5 weeks now, and I've been<br>> really happy with it, but I'm still having an echo problem that I've<br>> exhausted google with, and can't get straight...<br>
><br>> I think I've determined that because I'm using $7 voice modem clones for my<br>> FXOs that bad echo is going to just keep being a pain to me... I think I<br>> should have only tried going through "proof of concept" state with them,
<br>> switching to something a little better quality when it was time to actually<br>> commit to Asterisk.<br>><br>> So, my question is "What's better and why: 1: a 'real' digium PCI card with<br>> two fxo plugins, or using a couple external SIP fxo units like a
<br>> grandstream, zoom, or similar" Personally, I think it would be desirable to<br>> keep the FXOs out of the asterisk box itself, just to give me future<br>> flexability to move to whatever the platform of the day I want to put
<br>> asterisk on, without dealing with a PCI card to move, but if the consensus<br>> is that the voice quality and support for the digium board is the best, then<br>> that's what I'll do..<br>><br>> So, any comments on relative quality of these devices, and/or ones I've
<br>> missed?<br>> 1: Grandstream HT-488<br>> 2: Zoom 5801/5802<br>> 3: DGM-TDM02B (TDM 400P with two FXOs)<br>><br>> Are there any IAX2 FXOs that I'm missing? That seems to be an area that's<br>> oddly not taken care of...
<br>><br>> Any hints would be greatly appreciated!<br><br>Steve,<br>I have a similar setup at home, although I am in the UK. I've got the<br>echo fairly well under control, however it seems much less when using<br>my Cisco 7960 rather than
<br>the Grandstrean BT102 phone.<br>Have you tried dropping the gain?<br>Have you made sure you have both cards on seperate IRQ's which are not<br>in use by network, video etc? I disabled USB and on board audio in the<br>
BIOS to help free up IRQ's.<br>I think your best option is the TDM400 card, or perhaps consider the<br>Sangoma card with a dual FXO module, maybe slightly cheaper!<br>I'd be interested what SIP phones you are using and if echo differs
<br>between them.<br><br>Mike<br><br><br><br><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com">Easynews.com</a> --<br><br>Asterisk-Users mailing list
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