Summary:ASTERISK-03005: voicemail server send RTP packets before receive ACK
Reporter:david (david)Labels:
Date Opened:2004-12-15 13:00:20.000-0600Date Closed:2004-12-15 15:58:27.000-0600
Versions:Frequency of
Environment:Attachments:( 0) firstword.cap
Description:When dial *89 to connect to the voicemail server, the first word "Password" is hard to be heard.  After checking the Ethereal capture(attached firstword.cap), we found the voicemail server immdiately send RTP packets just after it send 200 OK.  Based on RFC 3261, it should send the packets after receive ACK from the phone side.
Comments:By: Brian West (bkw918) 2004-12-15 13:10:22.000-0600

put a Wait(1) before the voicemail.


By: david (david) 2004-12-15 13:32:10.000-0600

Thanks a lot, bkw.  That's what we're doing right now.  But the problem is still there, if some slower phone takes longer time than 1 second to initialize resources, and it's unfair to faster phones to stay 1 second or longer each time.  More importantly, it doesn't comply RFC.

By: Mark Spencer (markster) 2004-12-15 15:20:21.000-0600

There's no reasonable way to change that behavior (i.e. to delay transmission of audio until ACK is received).  Further, I believe that the Wait(1) is a reasonable work around.