>From the checking I've done, it looks like SIP proxies are pretty commonly available now. It may not all be consistent, though. I see that some of our embedded firewall devices do something called "SIP Transformations"
On Tue, 2004-07-06 at 14:40, -ray wrote: > On Tue, 6 Jul 2004, Tim Fournet wrote: > > > and long distance. Only downside to Packet8 is that they don't support > > devices other than their own, so you can't plug in your own SIP phone or > > soft-phone into their network.. Hopefully that'll change at some point. > > That is because they are using proprietary extensions to the SIP protocol > to allow NAT traversal. Vonage and FWD do this also. Standard SIP embeds > IP addresses in the data portion of the packet, so NAT breaks it. There > are workarounds, but no standard (that i know of) for SIP and NAT to play > nice. I don't think you'll be able to buy your own phone until the > limitations in SIP are fixed. > > ray > > > > _______________________________________________ > General mailing list > [email protected] > http://brlug.net/mailman/listinfo/general_brlug.net
