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Ajit Jaokar

Thanks Martin for this blog. You raise an important issue and I have blogged and tracked back to it. keep up the good work! http://opengardensblog.futuretext.com/archives/2009/03/grand_central_a.html rgds Ajit

Ulf Nilsson

Perhaps it is worth mentioning that this solution was considered by 3GPP but thrown out due to lack of support (T-Mobile being basically the only company, not just operator that acfively supported it in the discussions) and complexity reasons.

Also, the solution has issues with the roaming of voice and VOLGA may in the end be just another home network-only voice solution.


Hi Ulf,

Thanks for the comment. When I look at 3GPP TR 23.879, I see the roaming architecture for this solution quite well described.

From a complexity point of view, I think it is much simpler than others described in the same document, since most, if not all changes have to
be made on the gateway who's vendors I imagine are quite flexible and willing to do it very quickly.


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