Richard Dobson schrieb:
Voice and audio is not like that. You will need to transfer it reliably.
TCP is what SIP/SDP has selected (there's another protocol at that layer
too that's been drafted for use). Their model of getting around NATs and
firewalls is also a lot like proxy65 in that a third party server is
used.
Are you sure? I thought they used RTP, and I was under the impression
RTP uses UDP not TCP, as TCP is not appropriate for real time data
(audio) due to various reasons that are outlined in the information
about RTP.
Richard
Richard's right. UDP is used for transmission of RTP data. The frame
size for audio and video packets is about 20-100ms, so dropouts are not
a serious threat to communication security.
Regards,
Ulrich
_______________________________________________
jdev mailing list
[email protected]
http://mail.jabber.org/mailman/listinfo/jdev
