I failed to mention I'm using a Cisco 2600 with Sip Re-invites.. and YES, I do have the echo can on the Cisco turned on, The echo is SOOOO bad, it's not even touching it... When we place 1-800 calls or call LD via our offnet provider, everything works fine, it's just with local calls on the PRI... We found out that the 1-800 #'s go out our carriers Sonus switch (a VoIP switch) which has 128ms Echo Can in it... Hmmm...
Thanks, Billy ----- Original Message ----- From: "Brent Franks" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, July 01, 2004 12:16 PM Subject: Re: [Asterisk-Users] Echo cancellation, when software doesn't cut it. Whats next? > On Thu, 1 Jul 2004, Mike Benoit wrote: > > Obviously the less I spend the better. But if we have to, a few thousand > > more I guess. The problem I have is that this setup is more of a "trial > > run". Once it works, I'm going to be cloning slightly smaller setups to > > 9 other cities. But they are pretty small, 1 or 2 lines and 2-4 phones > > in each location. > > I totally understand this. My users complain frequently about echo, and I > am still unable to determine why sometimes it works great, other's it does > not. The CPU and Memory are powerful enough to handle it, and we rarely > ever see any load on the box. > > I too feel this is the major caveat to Asterisk right now. I am curious > how anyone is achieving a near echo free system. We are shooting for 1 > out of every 300 calls to have echo, which I think can be a realistic > goal. Given the nature of open source, and the mix-and-match of > components that come up, I can see where Digium is in a hard place to nail > down the cause of every occurance. > > > > > I will only be using POTS lines in each location. > > > > The current setup works great besides the echo, and some of the > > information I've read point to the Telco being the issue. If thats the > > case, I should in theory be able to get them to fix the problem. (though > > I could be dreaming) > > I think ultimately, if a Mediatrix box, or Cisco box can accomplish echo > cancellation, Asterisk should be able to do it with as much success. > Being that I am not an experienced Programmer, I try not to complain to > loudly. With my level of involvement, I typically make the business case > to customers and spec out ROI, etc. I do have a technical background, and > am getting better at trouble shooting Asterisk and working on the source > code. In fact, subscribing to the CVS list has taken me leap years ahead > of understanding the changes and why they are being committed. > > I don't know how much more putting a DSP to handle echo can on the cards > would cost, but if it were 400 - 500 more I would certainly pay it without > a second thought, provided it worked. Echo, I think, is the largest draw > back to VoIP, and will be the limit to entry into many businesses. I know > my client, if they were to do it all over again, would choose a regular > TDM (nortel, avaya) solution over the echo they are experiencing. > > I think asterisk is definitly headed in the right direction though, and > nothing good comes over night. So everyone who has worked on it deserves > to be commended. Without their insight and dedication, we wouldn't even > be talking about this, or have alternatives to turn to. > > Regards, > > - Brent > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
