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

[dotnetdub]

On 1 July 2010 22:41, Dmitri Korotkov <dmitri.korotkov at festart.ee> wrote:

>  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"<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 пишет:
>
>
>
> I'm not overly familiar with rtpproxy as we use mediaproxy but you will
need to engage it somewhere in your script, are you doing that?

Take a look at
http://www.voip-info.org/wiki/view/Kamailio+1.5.x+and+RTPProxy

Can you see any rtpproxy messages in syslog?




> On 1 July 2010 21:53, Dmitri Korotkov <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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