[SR-Users] One way audio on calls from pstn

[Dmitri Korotkov]

Hi,

voice:/# ps auxf |grep rtpproxy |grep -v grep
rtpproxy  1291  0.0  0.0  26800   876 ?        Ssl  Jun18   0:10 
/usr/sbin/rtpproxy -u rtpproxy rtpproxy -l my.public.ip.here -s 
udp:localhost 7722
voice:/#


kamailio.cfg:
#!define WITH_MYSQL
#!define WITH_AUTH
#!define WITH_ACCDB
#!define WITH_NAT
#!define WITH_PSTN

#!ifdef WITH_NAT
loadmodule "nathelper.so"
#!endif

# ----- nathelper -----
#!ifdef WITH_NAT
modparam("nathelper", "rtpproxy_sock", "udp:127.0.0.1:7722")
modparam("nathelper", "natping_interval", 30)
modparam("nathelper", "ping_nated_only", 1)
modparam("nathelper", "sipping_bflag", 7)
modparam("nathelper", "sipping_from", "sip:pinger at kamailio.org")
modparam("registrar|nathelper", "received_avp", "$avp(i:80)")
modparam("usrloc", "nat_bflag", 6)
#!endif



02.07.2010 0:32, dotnetdub ?????:
>
>
> On 1 July 2010 21:53, Dmitri Korotkov <dmitri.korotkov at festart.ee 
> <mailto:dmitri.korotkov at festart.ee>> wrote:
>
>     Hello,
>
>     I have kamailio installation WITH_PSTN, WITH_NAT and rtpproxy.
>     Using following scenario:
>     [kamailio]<-sip trunk ->[asterisk gw] <->sip trunk <-> [PSTN provider]
>
>     All kamailio sip subscribers are behind nat in different networks.
>
>     1. OK. Local kamailio users can call one to other even they are on
>     different networks behind nat.
>     2. OK. Outgoing calls from kamailio users to PSTN work also very well.
>     3. Not OK.  Incoming from PSTN side calls have only one way audio.
>
>     I tcpdump'ed kamailio box and found, that pstn provider sends RTP
>     packets to kamailio IP in case of answered call.
>
>     I guess that rtpproxy is not active in case of pstn call.  Is it
>     true ?
>
>     I am using more less default kamailio config
>
>     Could you please suggest solution ?
>
>     BR,
>     Dmitri
>
>
>
> Hi Dmitri,
>
> Check out the nathelper module.
>
> Regards,
> Brian
>

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