[Asterisk-Users] strange sound when bridging Zap

[Andrew Kohlsmith]

Forgot to add the zapata configuration:

usecallerid=yes
callwaiting=yes
callwaitingcallerid=yes
rxwink=300
hidecallerid=no
threewaycalling=no
transfer=no
cancallforward=no
callreturn=no
relaxdtmf=no

context=fxo
callerid=asreceived
signalling=fxs_ks
transfer=no
group=2
callgroup=2
pickupgroup=2
echocancel=128
echocancelwhenbridged=yes
echotraining=yes
callprogress=no
channel => 17-24