As many of you know who have been long time readers, I have been very concerned about Port Blocking, first from the streaming media content distribution sector, but knowing how the implications could impact VoIP.
If Mr. Blog is correct, and I have no reason to doubt him, it appears BT in their wisdom has made themselves a royal pain in the butt of people hoping to use VoIP by blocking port 5060.
It's a bit of a surprise as I was in the UK recently and had no problem using either the Linksys adapter from Vonage or their SoftPhone or AT&T's CallVantage.
Pehaps AT&T was right when they chose to use a different port for CallVantage which doesn't use 5060 for traffic.
Are you aware of a list of all ports and their applications?
If yes, please post it...
Posted by: Assaf Tadmor | October 29, 2004 at 06:52 AM
To my knowledge BT are not actively blocking port 5060.
However, their default DSL modems (Alcatel Speedtouch) DO appear to mangle SIP signalling messages.
Posted by: James Body | October 29, 2004 at 01:00 AM