Calling non-PSTN numbers via a mobile terminal

1. A method of operating a mobile terminal comprising:

determining a terminating address to which a call is to be initiated;

determining whether the terminating address can be used by the mobile terminal to directly initiate the call;

when the terminating address can be used by the mobile terminal to directly initiate the call, directly initiating the call using the terminating address; and

when the terminating address cannot be used by the mobile terminal to directly initiate the call, sending the terminating address to a service node, which will facilitate an indirect call process using the terminating address to establish the call.

2. The method of claim 1 wherein the service node establishes a first link between an interface node and the mobile terminal and a second link between the interface node and an endpoint associated with the terminating address, such that the first and second links form at least part of a bearer path for the call between the mobile terminal and the endpoint.

3. The method of claim 2 wherein establishing the first link comprises receiving a setup call initiated by the service node at the interface node and answering the call to establish the first link between the interface node and the mobile terminal.

4. The method of claim 2 wherein establishing the first link comprises initiating a setup call to the service node via the interface node to establish the first link between the interface node and the mobile terminal.

5. The method of claim 4 further comprising receiving a service node address for the service node from the service node.

6. The method of claim 1 wherein the terminating address is sent to the service node via a first network communication path and the call is established via a second network communication path.

7. The method of claim 6 wherein the first network communication path is through a cellular packet network and the second network communication path is through a cellular voice network.

8. The method of claim 1 wherein when the terminating address is a PSTN address, using the terminating address to directly initiate a call, and when the terminating address is a non-PSTN (Public Switched Telephone Network) address, sending the terminating address to the service node to initiate the indirect call process.

9. The method of claim 8 wherein the non-PSTN address is one of a group consisting of private network addresses and packet based addresses.

10. The method of claim 1 wherein determining whether the terminating address can be used by the mobile terminal to directly initiate the call is based on whether the mobile terminal is operating in a cellular or local wireless mode.

11. A method comprising:

receiving a terminating address from a mobile terminal in response to the mobile terminal determining that the terminating address cannot be used by the mobile terminal to directly initiate a call;

establishing a first link between an interface node and the mobile terminal; and

establishing a second link based on the terminating address between the interface node and an endpoint associated with the terminating address, such that the first and second links form at least part of a bearer path for the call between the mobile terminal and the endpoint.

12. The method of claim 11 wherein establishing the first link further comprises initiating a setup call to the mobile terminal tough the interface node to establish the first link between the interface node and the mobile terminal.

13. The method of claim 11 wherein establishing the first link comprises receiving a setup call from the mobile terminal via the interface node to establish the first link between the interface node and the mobile terminal.

14. The method of claim 13 further comprising sending a service node address to the mobile terminal, which uses the service node address to initiate the setup call.

15. The method of claim 11 wherein the terminating address is received from the mobile terminal via a first network communication path and the call is established via a second network communication path.

16. The method of claim 15 wherein the first network communication pat is through a cellular packet network and the second network communication path is through a cellular voice network.

17. The method of claim 11 wherein the terminating address is a non-PSTN (Public Switched Telephone Network) address.

18. The method of claim 17 wherein the non-PSTN address is one of a group consisting of private network addresses and packet based addresses.

19. The method of claim 11 further comprising translating the terminating address to a format necessary for establishing the second link.

20. An apparatus terminal comprising:

at least one communication interface; and

a control system associated with the at least one communication interface and adapted to:

determine a terminating address to which a call is to be initiated;

determine whether the terminating address can be used to directly initiate the call;

when the terminating address can be used to directly initiate the call, directly initiate the call using the terminating address; and

when the terminating address cannot be used to directly initiate the call, send the terminating address to a service node, which will facilitate an indirect call process using the terminating address to establish the call.