On Thu, 12 Jun 2003, Michael Manousos wrote: > Thanks for your thorough report and test results. > You are right. The transmission of voice packets after > silence periods is done with incorrect timestamps, > causing slight voice drop-outs. > I 'll see how this can be fixed and let you know.
Cool. Thanks in advance! And while I'm at it: thanks for writing the driver in the first place! Let me know if I can do anything to help... Cheers, Siggi (unchanged fullquote follows...) > Siggi Langauf wrote: > > After some more analysis of my "dropped fragment" problem, things look > > like this: > > > > Cisco 7940 phone -- RTP --> chan_oh323 --> Asterisk > > (running, eg., VoiceMailMain) > > > > That RTP connection was negotiated via H.323 on a third machine running > > Cisco CallManager 3.2, but this part should not be relevant. > > > > Connections work fine, with one exception: > > > > Whenever there's a break in *'s voice stream (eg. between the "mailbox" > > and "password" prompts), the 7940 detects horrible jitter and drops a few > > packets (eg. the whole "password" prompt). > > > > Using ethereal, I found that the RTP packets sent by asterisk seem to have > > bogus timestamps: > > After the gap, timestamps continue just as if there hasn't been a gap, so > > timestamp / sequence number always is constant. > > This should be fine for continuous RTP streams, so I tried disabling > > silence suppression in oh323.conf. However, * still only sends out packets > > while it is playing, and not between playback phases. > > So AFAICT, there are two possible solutions: > > > > 1) make chan_oh323 stream continuously, no matter if the current > > application does not play audio. IOW: transmit silence instead of no > > packets. Is this possible? > > > > 2) use better timestamps in streamed packets, ie increase timestamps even > > after a period of silence, and not only for each sent packet. > > Not sure if that makes the phone happy, though... > > > > Any chance to do one of those? > > > > Thanks in advance, > > > > Siggi > > > > > > _______________________________________________ > > Asterisk-Users mailing list > > [EMAIL PROTECTED] > > http://lists.digium.com/mailman/listinfo/asterisk-users > > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users