Methods and systems for making telephone calls

1. A method for making a call that is billed to a subscriber's telephone account, comprising:

receiving a request to make the call on a packet-switched network;

delivering the request from the packet-switched network to a circuit-switched network;

initiating, over the circuit-switched network, a first leg of the call to a caller device based on the request;

forwarding, over the circuit-switched network, a second leg of the call to a receiver device;

specifying a subscriber's number in a setup message for the second leg of the call;

sending a query message when the setup message triggers a setup trigger, the query message containing the subscriber's number and at least one of a calling party identification and a charge number;

sending a response message containing the subscriber's number substituted in the at least one of the calling party identification and the charge number;

connecting, over the circuit-switched network, the first leg and the second leg to make the call between the caller device and the receiver device; and

billing the call requested on the packet-switched network to the subscriber's telephone account on the circuit-switched network.

2. The method of claim 1 , wherein the caller device's telephone number is provisioned with a termination-attempt trigger, wherein initiating the first leg includes sending a second query message when the termination-attempt trigger is triggered, wherein the second query message contains the caller device's number and a calling party identification, and wherein the query message omits a redirecting party identification.

3. The method of claim 1 , wherein the method further comprises initiating the second leg of the call to the caller device, wherein the caller device's telephone number is provisioned with a termination-attempt trigger, wherein initiating the second leg includes sending a second query message when the termination-attempt trigger is triggered and wherein the second query message contains a subscriber's number, a calling party identification, and the receiver device's number.

4. The method of claim 1 , wherein the request includes at least one of a telephone number of a subscriber's telephone line, a telephone number of the caller device, and a telephone number of the receiver device.

5. The method of claim 1 , wherein the call conforms to a subscriber's caller identification restriction and does not provide the subscriber's identification to the receiver device.

6. The method of claim 1 , wherein billing comprises billing the call as if the subscriber originated the call on a subscriber's telephone line.

7. The method of claim 1 , wherein the method further comprises providing a calling identity to the receiver device that indicates a subscriber's telephone line.

8. The method of claim 1 , wherein the caller device is associated with a caller and wherein the caller and the subscriber are the same entity.

9. A method for making a call that is billed to a subscriber's telephone account, comprising:

providing a request to make the call using a packet-switched network;

delivering the request from the packet-switched network to a circuit-switched network;

initiating, over the circuit-switched network, a leg of the call to a caller device based on the request;

specifying a subscriber's number in a setup message for the leg of the call;

sending a query message when the setup message triggers a setup trigger, the query message containing the subscriber's number and at least one of a calling party identification and a charge number;

sending a response message containing the subscriber's number substituted in the at least one of the calling party identification and the charge number;

originating, over the circuit-switched network, the call between a caller device and a receiver device based on the request; and

billing the call requested on the packet-switched network to the subscriber's telephone account on the circuit-switched network.

10. The method of claim 9 , wherein initiating the call includes sending a second query message and wherein the second query message contains a create call message.

11. The method of claim 9 , wherein initiating the leg includes notifying the caller device with at least one of a power ring and a notify message.

12. The method of claim 9 , wherein the method further comprises sending a conversation message, wherein the conversation message contains an Intelligent Peripheral's address and an announcement identification.

13. The method of claim 9 , wherein originating the call arms at least one of an answer event and a disconnect called event.

14. The method of claim 9 , wherein the method further comprises sending a conversation message, wherein the conversation message contains at least one of an Intelligent Peripheral's address, an announcement identification, a party identification, and a party on hold parameter.

15. The method of claim 9 , wherein the call conforms to a subscriber's caller identification restriction and does not provide the subscriber's identification to the receiver device.

16. The method of claim 9 , wherein billing comprises billing the call as if the subscriber originated the call on a subscriber's telephone line.

17. The method of claim 9 , wherein the method further comprises providing a calling identity to the receiver device that indicates a subscriber's telephone line.

18. A method for making a call that is billed to a subscriber's telephone account, comprising:

sending a request to make the call on a packet-switched network, wherein the request is delivered from the packet-switched network to a circuit-switched network and wherein the request initiates, over the circuit-switched network, a first leg of the call to a caller device;

completing the first leg, wherein the first leg is connected, over the circuit-switched network, to a forwarded second leg of the call to make the call between the caller device and a receiver device and wherein the call requested on the packet-switched network is billed to the subscriber's telephone account on the circuit-switched networks;

specifying a subscriber's number in a setup message for the second leg of the call;

sending a query message when the setup message triggers a setup trigger, the query message containing the subscriber's number and at least one of a calling party identification and a charge number; and

sending a response message containing the subscriber's number substituted in the at least one of the calling party identification and the charge number.

19. The method of claim 18 , wherein the caller device is associated with a caller and wherein the caller and the subscriber are the same entity.

20. A method for making a call that is billed to a subscriber's telephone account, comprising:

providing a request to make the call using a packet-switched network, wherein the request is delivered from the packet-switched network to a circuit-switched network, wherein the request initiates, over the circuit-switched network, a leg of the call to a caller device, and wherein the request originates, over the circuit-switched network, the call between the caller device and a receiver device;

specifying a subscriber's number in a setup message for the leg of the call;

sending a query message when the setup message triggers a setup trigger, the query message containing the subscriber's number and at least one of a calling party identification and a charge number;

sending a response message containing the subscriber's number substituted in the at least one of the calling party identification and the charge number; and

completing the call, wherein the call requested on the packet-switched network is billed to the subscriber's telephone account on the circuit-switched network.

21. The method of claim 20 , wherein the caller device is associated with a caller and wherein the caller and the subscriber are the same entity.