Sanjeeb, If you have the option, I recommend forcing G711 for any FAX even though it takes more bandwidth.
Good Luck, Brian 2009/4/7 Deka Sanjeeb Kumar-KHBJ46 <khb...@motorola.com> > 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? > > Regards. > > Sanjeeb > > ___________________________________________________________________________ > Sent via: Wireshark-dev mailing list <wireshark-dev@wireshark.org> > Archives: http://www.wireshark.org/lists/wireshark-dev > Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev > mailto:wireshark-dev-requ...@wireshark.org?subject=unsubscribe >
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