[Asterisk-Users] Echo's and dropped calls

[Brent Franks]

I have the same problem, it appears to be a problem with the echo
canceller.  I have elected to install a DSP based T1 echo canceller, on
advice from TC.

Will report on how I make out.

Brent

On Thu, 1 Apr 2004, Justin Carlson wrote:

> how do you adjust ?
> 
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com]On Behalf Of John Vogel
> Sent: Thursday, April 01, 2004 12:25 PM
> To: asterisk-users at lists.digium.com
> Subject: RE: [Asterisk-Users] Echo's and dropped calls
> 
> 
> 
> Did you play with txgain and rxgain? Reduces echo but also volume -
> 
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Justin Carlson
> Sent: Thursday, April 01, 2004 10:21 AM
> To: asterisk-users at lists.digium.com
> Subject: RE: [Asterisk-Users] Echo's and dropped calls
> 
> on both the box with the zap interface and the remote office.  it helped
> some but the problem remains
> 
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com]On Behalf Of John Vogel
> Sent: Thursday, April 01, 2004 12:10 PM
> To: asterisk-users at lists.digium.com
> Subject: RE: [Asterisk-Users] Echo's and dropped calls
> 
> 
> 
> Do you have
> 
> echocancel=yes
> echocancelwhenbridged=yes
> echotraining=yes
> 
> In your zapata.conf file? Wiki is good for this -
> 
> John V.
> 
> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Justin Carlson
> Sent: Thursday, April 01, 2004 9:45 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Echo's and dropped calls
> 
> Hi all,
> 
> 	I have a problem with echo and silence in the middle of calls.  the
> echo problem is that in the first 5 to 10 seconds of a call there is echo on
> the sip side but not on the PSTN side, also the echo will randomly come back
> in the call sometimes, I'd say 3 out of 10 calls.  the other problem I have
> is that sometimes ( like maybe 4 times a day ) we will be talking to PSTN
> calls and one side of the call will go silent and then 5 to 10 seconds later
> come back.  we have this setup.
> 
>   PSTN <--> Asterisk /w T100p <-IAX2-> Asterisk2 /w zapdummy <-sip> snom
> 200's, and locally in our office it looks like this
>   PSTN <-T100p-> Asterisk <-sip-> snom 200's (the echo is on this setup as
> well)
> 
> any help would be appreciated.
> 
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