From the wireless LAN in Office buildings onto gsmWhen you step out of the Office and also through wireless LAN again.When sitting in a subway station by all thisIt must be determined how to hand-off.
The wireless LAN in the office building into a system gsm Stepping out of the office and through the wireless LAN again when sitting in the metro, all of it must be determined how the hand-off.
The wireless LAN in the office out to the System GSM when stepped outside the office and through wireless LAN and again when sitting in the subway by all this must be set to hand-off.