[Asterisk-Users] Zap channel calling back after hangup (due to polarity CID detection)

[Anders F Eriksson]

Today I received a TDM11B (1 FXO and 1 FXS) and got it installed just fine.
I bought the card mainly to get caller ID to work properly in Sweden, and
that works just fine.

However, if the called or calling party hangs up after I hangup my SIP
channel, polarity CID detection kicks in and dials a couple of signals to my
incoming context. This happens with Asterisk 1.0.6 and CVS-HEAD. I have
tried various combinations of hanguponpolarityswitch and
answeronpolarityswitch (and without them).

I'm sure this has been solved several times, but I can't seem to find it
anywhere - any help appreciated :)

My zapata.conf at the moment looks as follows:

;*************************************************************************
; zapata.conf
;*************************************************************************
;
[channels]
;
; TDM11B plugged into PSTN
;
signalling=fxo_ks
busydetect=yes
echocancel=yes
echocancelwhenbridged=yes
echotraining=400
usecallerid=yes
callerid="Siemens" <450>
group=1
threewaycalling=yes
transfer=yes
context=norby  
channel => 1

signalling=fxs_ks
txgain=0.0
rxgain=15.0
usecallerid=yes
callerid=asreceived
cidsignalling=dtmf
cidstart=polarity
transfer=no
group=2
context=analog_in 
answeronpolarityswitch=no
hanguponpolarityswitch=yes
channel => 4