asterisk users - Apr 2004 - 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.

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@lists.digium.com
[mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Justin Carlson
Sent: Thursday, April 01, 2004 9:45 AM
To: asterisk-users@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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