Hi All,
I was trying to send FAX over IP network.
I enabled G729 and t.38 codec on both
endpoints.
While checking the Wireshark trace of the session, i
saw that first negotiation was done with G729 and media started flowing using this
codec.
After some time re-negotiation happened with t.38
codec and FAX was properly transmitted.
But in the Wireshark trace could not see RTP
packets with t.38 codec. RTP using G729
was still flowing even after the successfull negotiation with t.38. However the SSRC of the new G729 stream was changed to 0x0000(earlier it was
a different value).
Moreover, i could see
"Unknown RTP version 0" in the Wireshark trace after
the second negotiation(negotiation with t.38).
I am not
sure whether FAX was transmitted using G729 or t.38.
Could anyone
help me out for the above scenario?
I am
using 0.99.6.0 version of Wireshark.
Regards.
san