FW: [Asterisk-Users] WiFi / GSM VoIP Handsets..

[Peter Bowyer]

On 22/05/06, Steve Kennedy <steve-asterisk at gbnet.net> wrote:
> On Mon, May 22, 2006 at 08:14:19AM -0500, Eric ManxPower Wieling wrote:
>
> > If you want to roam between GSM and WiFi while on a call, the GSM
> > carrier is going to have to support it.
>
> There is a protocol for this (UMA), however few operators as yet support
> it.
>
> T-Mobile offer a webnwalk tarrif (unlimited data access for a fixed
> monthly fee), but they are are going to (if not already) block VoIP
> calls - they've realised that users are using VoIP (probably Skype) and
> not making GSM voice calls - and the voice revenue is declining.

They block VoIP and IM, supposedly to protect their users from a poor
quality experience. Of course, it's really to protect their voice and
SMS revenues.

Peter

-- 
Peter Bowyer
Email: peter at bowyer.org