Couple thoughts.
first - I hope you have reversed your files listed and zaptel is
really zapata and vice versa
second - always stop and start * when making changes to zapata -
reload does not cut it - (some experience here)
third - I wound up with a fairly echo free system using the software
echo cancel within * but it was not good enough for a commercial
application. I opted out for hardware echo cancelling via DSP and
spent the bucks. They have been very good and I was able to turn off
on * and reduce its load.
My largest intermittant source of echo was traceable to various LEC/
IXC who were clueless on proper installation procedures. I was able
to work with some to remedy but having them keep popping up and
receiving customer complaints made it worth spending the $$$.
good luck
On May 26, 2005, at 12:14 PM, Ronald Hartmann wrote:
Good Day all,
I have a Fractional PRI connected to my Asterisk Box via a T100P
card.
When I initiate a call out to phone number 123-8888 the call
sounds great no echo what so ever.
If the person at 123-8888 hangs up and calls me right back (same
handset on both sides) same trunk line
The call always has echo on it. The Asterisk sip extension
hears them selves echoing. The remote party does not notice any
difference.
I have tried all the following.
#define CONFIG_ZAPTEL_MMX <tried this defined and undefined>
Then tried each of the following types of echo cancellations.
#define ECHO_CAN_MARK
#define ECHO_CAN_MARK2 with and without #define
AGGRESSIVE_SUPPRESSOR
#define ECHO_CAN_MARK3
I am completely at a loss on how to get rid of this echo problem. The
system is completely useless for incoming calls, as it currently
stands.
Is there a Digium card that handles echo better? Are there any
asterisk
compatible cards with hardware echo cancellation available?
Thanks
Ron
[Zapata.conf]
span=1,1,0,esf,b8zs
bchan=19-23 # set this to 1-15,17-31 for E1
dchan=24 # set this to 16 for E1
defaultzone=us
loadzone=us
[Zaptel.conf]
[channels]
language=en
signalling=pri_cpe
switchtype=national
pridialplan=unknown
echocancel=yes
echocancelwhenbridged=yes (tried no)
echotraining=400 (tried 800 also)
usecallerid=yes
callerid=asreceived
overlapdial=yes
immediate=no
group=0,1
context=from-pstn
channel => 19-23
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