Dear Klaus, 

Thanks for your quick response.(just as you did ever)

I am using rtpproxy. 
However , in my case , the error was shown as below:
----------------------------------------------------------------------------------

 6(32425) INFO: <script>: ALERT: force_rtp_proxy called

 6(32425) ERROR: rtpproxy [rtpproxy.c:2211]: incorrect port 0 in reply from rtp proxy

 8(32427) INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via

 6(32425) ERROR: rtpproxy [rtpproxy.c:2211]: incorrect port 0 in reply from rtp proxy

 6(32425) NOTICE: acc [acc.c:275]: ACC: transaction answered: timestamp=1314035733;method=INVITE;from_tag=1499479423;to_tag=1172821397;call_id=415340348;code=200;reason=OK;src_user=123456789;src_domain=mydomain.org;dst_ouser=54321;dst_user=54321;dst_domain=114.158.89.92

 7(32426) NOTICE: acc [acc.c:275]: ACC: request acknowledged: timestamp=1314035733;method=ACK;from_tag=1499479423;to_tag=1172821397;call_id=415340348;code=200;reason=OK;src_user=123456789;src_domain=mydomain.org;dst_ouser=54321;dst_user=54321;dst_domain=114.158.89.92

 5(32424) INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via

 6(32425) NOTICE: acc [acc.c:275]: ACC: transaction answered: timestamp=1314035742;method=BYE;from_tag=1499479423;to_tag=1172821397;call_id=415340348;code=200;reason=OK;src_user=123456789;src_domain=mydomain.org;dst_ouser=54321;dst_user=54321;dst_domain=114.158.89.92

 7(32426) INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via

 5(32424) INFO: <core> [forward.c:786]: broken reply to forward - no 2nd via

----------------------------------------------------------------------------------

Appreciate any hints. Thanks a lot.

Coca


2011/8/23 Klaus Darilion <klaus.mailinglists@pernau.at>


Am 22.08.2011 16:18, schrieb Coca:
> Hi list,
>
> We are using Kamailio3.1.
>
> The calls are working fine when both UAs are in 3G or different WiFi.
> However, when both UAs are in LAN (using WiFi)  , the call become silent.

Seems like a NAT problem.

> What should we do?

A media relay like rtpproxy is needed, or some application logic to use
local IP addresses (ICE).

regards
klaus


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