[Asterisk-Users] Echo on Zaptel hardware (Wildcard 100XP)

[Matt]

I've enclosed by config... I've tried everything from lowering the
tx/rx gains.. to toying with 32/64/128 echo canceling taps... at 256
echoing is really bad...

I've even tried recompiling the zaptel driver with the MARK2 super
echo canceling support...

I still have a very slight echo that I simply can not get rid of....
this echo is ONLY when going VoIP to POTS.. and I understand why it is
happening.. but any thoughts on how to get rid of it?



; Zapata telephony interface
;
; Configuration file

[trunkgroups]

[channels]

language=en
context=from-pstn
signalling=fxs_ks
rxwink=300              ; Atlas seems to use long (250ms) winks
;
; Whether or not to do distinctive ring detection on FXO lines
;
;usedistinctiveringdetection=yes

usecallerid=yes
hidecallerid=no
callwaiting=yes
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
transfer=yes
cancallforward=yes
callreturn=yes
;echocancel=yes
echocancel=64
echocancelwhenbridged=no
echotraining=800
;echotraining=yes
rxgain=-5
txgain=-4
group=0
callgroup=1
pickupgroup=1
immediate=no

;faxdetect=both
faxdetect=incoming
;faxdetect=outgoing
;faxdetect=no

;channel => 1
#include zapata-channels.conf



and zapata-channels.conf is:
; Span 1: WCFXO/0 "Generic Clone Board 1" RED
signalling=fxs_ks
callerid="" <0>
mailbox=
channel => 1


; Span 2: ZTDUMMY/1 "ZTDUMMY/1 1"