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

[Steve Underwood]

Steve Kennedy 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.
>  
>
Probably few ever will support it. It isn't in their interests to 
support it. The people who defined UMA failed to work out a sane 
business model for it before starting.

>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.
>  
>
Regards,
Steve