Comcast Users

[gbh2o]

you're mixing two different things. VOIP does not use TCP, so comcast's forged RST packets are not germane (they use those to hose P2P users). What has been speculated here is that they are (deliberately or otherwise) corrupting various SIP packets. Why this affects some and not others, we don't know.

I had earlier suggested doing a TCP implementation to get around some of these problems. VoIP _CAN_ be used for VoIP. It is so far rare. There have been many the have analyzed the degree of difficulty and trade-offs vs benefits. Results, a bit of a toss up I think. TCP definitely can work as some demonstrations have shown and even can have some benefits, [waffle here] depending on the situation.