Here is from the other page of that PPT slide...the other one that I posted before this one has a title "Birdstep Approach" (slide #11)
...as you can see here and that other info from the other slide that Birdstep might soon be dumped by it's so called "partners" pretty soon...
"Proxy HA + VPN Approach" (slide #12)
Advantages
Supports standard Mobile IPv4 No need for special features in existing Firewall solutions No extra overhead in client traffic Enables separation of the VPN termination if the HA is not reachable from public network Creates a new product nisch Enhanced functionality in a ”Nortel Only” Environment. E.g in administration and network management area Nortel ”free” to set the price Maybe possible to file patent in this area
Drawbacks
Solution in eploration phase, no products available in near future Requires an ”integrated” MIPv4/VPN client
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