We have been distributing asterisk servers for several years now, and early on decided that hardware echo can was the way to go. Our first few boxes without it had horrid echo problems, and attempts at tuning in 2006 didn't make any difference. We installed a new server yesterday at a client's location with a Rhino 4 port FXO card (HW EC included), and when an inbound call was answered the oddest shrieking sound was heard by the caller, and the internal SIP phone heard nothing at all. On a call with Rhino support they disabled the echo cancellation module and all was well, though of course we have a horrible echo problem now. We are going through an RMA process with Rhino, which is fine (kudos for them to cross ship - really good support team there). But the client is of course chomping at the bit to get the system live. We are totally out of touch on the subject of software echo cancellation in asterisk. The system is running 1.4.28 and Dahdi 2.2.1-RC2. I understand that when Dahdi detects no HWEC, it enables SWEC by default. Is there anything I can do to tweak the settings to try and make this liveable for the client until we get the card? The server is in the Caribbean, so it may actually be a bit before the card arrives. We would love to get them running before then, but it is so bad right now that we cannot. Thanks for any links to info... Cheers, j
At 09:49 AM 6/10/2010, you wrote:>The system is running 1.4.28 and Dahdi 2.2.1-RC2. I understand that >when Dahdi detects no HWEC, it enables SWEC by default. Is there >anything I can >do to tweak the settings to try and make this liveable for the >client until we >get the card? The server is in the Caribbean, so it may actually be a bit >before the card arrives. We would love to get them running before >then, but it >is so bad right now that we cannot. > >Thanks for any links to info...If it was me, I'd sure risk the $40 for 4 lines worth of HPEC. I have a Digium card so it was free, but I put up with a year of messing with the other software echo cans before HPEC was released and the day I got it working was the last day I ever heard echo and the last day my wife ever complained about it. OSLEC is also supposed to be good, but HPEC is easy and it works. Might work good enough you can stop buying hardware echo solutions for small installations. Ira
On Thu, 10 Jun 2010, Jeff LaCoursiere wrote:> We are totally out of touch on the subject of software echo cancellation in > asterisk. The system is running 1.4.28 and Dahdi 2.2.1-RC2. I understand that > when Dahdi detects no HWEC, it enables SWEC by default. Is there anything I can > do to tweak the settings to try and make this liveable for the client until we > get the card? The server is in the Caribbean, so it may actually be a bit > before the card arrives. We would love to get them running before then, but it > is so bad right now that we cannot.I've been using OSLEC and TDM400 type cards for a while now (openvox). It "just works" Gordon