27 Oct
2005
27 Oct
'05
3:16 a.m.
I have raised this issue in dev list but got no
response, hoping some
one here will be able to answer this.
I have read in RtpProxy that RtpProxy waits for both parties to send
atleast one udp packet and then it fills up both ip:port structures
associated with that call and then it starts relaying.
Yes, this is to ensure that the proxy can get through the NATs.
Call Setup is like this:
--------Media----->
A-Party ----->MG-------->SSW------>SER/RtpProxy------->B-Party
now only B-Party is sending UDP Packets and Ser/RtpProxy sends them to
SSW (signalling entity) instead of MediaGateway. As soon as RtpProxy
receives one udp packet from A-Party then it sends those RTP packets to
MG i.e. it starts relaying following the right path.
how I can solve this ???
I'm afraid I'm not capable of understanding what you are saying here.
You
have SSW in the media path? Or are you trying to show both media and
signalling path in the same picture? What is really the priblem? rtpproxy
will only do what you tell it to (using force_rtp_proxy). Is this confirm that RtpProxy will handle T38 or we
also need to handle
T38 in a special way. because as I described below paragraph that after
reinvite B-Party stopped RTP and started T38 packets in the same session
but RtpProxy failed to send to the right recepient.
It's not T38 that needs special handling, but as I said, the reINVITE.
g-)
Adding to this, now after RTP relay starts
successfully. B-Party (if
Dialed number is a FAX) reinvites with T38 and the IP:Port info in SDP
remains same. Now somehow RtpProxy is not recognizing the T38 packets
becuase we are in the same session and RtpProxy start sending those
T38 packets to SSW (signalling entity) instead of sending to MG. Please
remember we are in the same session, and RtpProxy shud send these T38
packets to MG, as it was sending RTP packets before ReInvite.
is it a bug in RTPProxy, should I use MediaProxy instead ???
You need to handle reINVITEs in a special way. Look at the Getting
Started
scripts (and document) from onsip.org for how to do it both for rtpproxy
and
mediaproxy.
g-)