| 摘要 |
System for automatic callback to a roaming user in response to the dialing of a destination number by the roaming user to connect the roaming user to the destination number without the expense of a mobile originated call, comprises: a roaming network based triggering unit for generating a trigger in response to the dialing of a destination number; a disconnection unit which disconnects the roaming user in the event of receiving the trigger, and a callback unit for placing a call between the caller and callee from the home network. Typically the call is made of two simultaneous calls one to each and connecting therebetween. The network based triggers may be Camel triggers.
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