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Bruce Fitzsimons

Nice analysis Martin. I believe Ericsson were one of the main instigators of this.

Arguably this should have been the starting point for Mobile IMS -- it solves the chicken/egg requirement for seamless VoIP clients on handsets and lets Telco's evolve their cores first. There are still some interesting feature interaction problems (e.g. diversion commands go to the HLR, but for IMS you'd probably want them to go to the HSS). All solvable if a bit clunky.

I've been having a look at eCall (every car with a builtin phone/SIM/subscription...) recently. Wow. Looks like it will be/is mandated by the EU (and US?) and could well mean that GSM network needs to be maintained for some time to come...

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