[Asterisk-Users] Echo Canceling

[canuck15]

I know that many don't like to say it on this message board out of political
correctness but in all honesty, Digium cards do not seem to have a very good
reputation.  They are slowly getting better.  

I cannot comment on the Digital cards but everyone knows of the problems
with interrupts and the TDM400P card.  Digium calls this imcompatibilities
with certain boards and configurations but the simple fact is that the
TDM400p cards do not handle interrupts very well and therefore they tend to
have these interrupt and compatibility issues. 

Sangoma seems to understand this better.  They have been making interface
cards a LOT longer than Digum so I think they are better at this.

Just my opinion. 

> -----Original Message-----
> From: Tad Heckaman [mailto:douglash at gmail.com] 
> Sent: Tuesday, October 04, 2005 7:38 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Echo Canceling
> 
> I have been battling echo since we installed a new system at 
> one of our clients. I am using a single span digium card. I 
> believe this is the first time someone has setup a PRI in 
> this area (its way out in the middle of nowhere). We get 
> slight echo on all calls, and when calling some numbers (long 
> distance calls but still in the local area), we get very loud 
> echo. The person calling out can hear their own voice at the 
> same volume about a half second after they speak. Its been 
> getting annoying and I have tweaked everything I can, and 
> even tried diferent echo cans in zaptel.  I have talked to the telco
> (Bellsouth) which does both local and long distance, and they 
> couldn't help me. They can fix the long distance echo, but 
> they seem to fix it only on a per number basis (I call with 
> one number, and they fix it, but then I call with another 
> number, and they fix that, but it never actually fixes ALL 
> the echo for long distance). I am looking into hardware echo 
> cancelers, but I haven't found a place to get one.
> 
> Would switching to Sangoma cards help fix my issues? I know 
> Digium cards have issues on some servers/motherboards, and 
> yet I haven't heard of any issues with Sangoma cards. If 
> someone has had issues then I would like to hear them.
> 
> I know I can find some hardware echo can's on ebay and wire 
> it up, but I would like to have a better product that comes 
> as a single span T1.
> 
> Thanks,
> Tad
> 
>