Granted Patent B2

US 7,941,146 · App. 11/651,520 · Granted May 10, 2011

Abstract

Claims (36)

1. A method for handling input during interswitch handover of a call from a first switching station to a second switching station, the method comprising:

receiving a message at the first switching station from the second switching station, the message including dual-tone multi-frequency (DTMF) digits received by the second switching station from a subscriber mobile station;

combining the DTMF digits with DTMF digits previously received from the subscriber mobile station at the first switching station;

comparing the combined DTMF digits to service triggers in a database; and

performing an operation on the DTMF digits associated with at least one of the compared service triggers.

2. The method of claim 1 , wherein the performing step plays tones to a network based on the DTMF digits.

3. The method of claim 1 , further comprising:

sending an acknowledgment message including a unique tag, which was included in the received message, in response to receiving the received message.

4. The method of claim 1 , wherein the DTMF digits received by the second switching station are directly received from the subscriber mobile station.

5. The method of claim 1 , wherein the DTMF digits received by the second switching station from the subscriber mobile station are at least a portion of a service trigger.

6. A method for handling input during a interswitch handover of a call from a first switching station to a second switching station, the method comprising:

receiving first dual tone multi-frequency (DTMF) digits at the second switching station from a subscriber mobile station;

establishing a first message queue in response to a interswitch handover request;

storing the received first DTMF digits in the first message queue;

sending a first call progress message including at least the first DTMF digits to the first switching station if the handover is successful;

receiving a DTMF request including second DTMF digits after releasing the first message queue;

establishing a second message queue and storing the received second DTMF digits therein; and

creating and sending a second call progress message, including at least the second DTMF digits, to the first switching station.

7. The method of claim 6 , further comprising:

receiving the interswitch handover request from the subscriber mobile station;

sending a path switch request to the first switching station; and

receiving a path switch response indicating that the interswitch handover is successful.

8. The method of claim 6 , wherein the first call progress message includes a unique tag.

9. The method of claim 8 , further comprising:

receiving a first acknowledgement message including the unique tag from the first switching station; and

releasing the first message queue.

10. The method of claim 6 , further comprising:

starting a guard timer after sending the first call progress message; and

releasing the first message queue after the guard timer expires.

11. The method of claim 6 , the receiving step receives the DTMF digits at the second switching station directly from the subscriber mobile station.

12. A method for handling input during interswitch handover of a call from a first switching station to a second switching station, the method comprising:

receiving, at the first switching station, a first set of dual-tone multi-frequency (DTMF) digits directly from a subscriber mobile station;

receiving, at the first switching station, a message from the second switching station, the message including a second set of dual-tone multi-frequency (DTMF) digits received by the second switching station directly from the subscriber mobile station;

combining the first and second sets of DTMF digits;

comparing the combined DTMF digits to service triggers in a database; and

performing an operation on the first and second sets of DTMF digits associated with at least one of the compared service triggers.

Assignments (10)