On 8/5/06 12:50 PM, "Andy Linton"
Robert Gray wrote:
On 8/05/2006 11:35 a.m., Simon Lyall wrote:
Don't forget to add another IP for every WIFI capable cell phone in the household, plus anything else that is mobile.
I have several SIP phones (one wifi after Jonny's excellent talk). They all work fine across NAT and are as good if not better than the landline whose days are happily numbered.
I've been reading this week that there are about 1 billion fixed phone line and around 2 billion cellphones in the world. And if we get to the point where each of these need an IP address...
Nokia, for instance, seem quite keen on the idea. v6 makes a lot of sense if you are going to put VoIP in a cellphone. Following on from that: NAT, as is well known, does not play well with some protocols (or vice versa, depending on your point of view). One of these is SIP. There are ways around this; they are messy and expensive and difficult to maintain. Now, if you start using SIPS (secure SIP), application level gateways for SIP/NAT simply become impossible. While this is not YET a significant problem... -- Michael Newbery IP Architect TelstraClear Limited Tel: +64-4-920 3102 Mobile: +64-29-920 3102 Fax: +64-4-920 3361