Devices, softwares and methods for handling off live calls between legs of CSV and VOX modalities

• US 20060089143A1
• Filed: 12/06/2005
• Published: 04/27/2006
• Est. Priority Date: 02/28/2002
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Jagadeesan, Ramanathan T.
• Granted Patent: US 7,299,049 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04M 7/0057 Services where the data services network provides a telephone service in addition or as an alternative, e.g. for backup purposes, to the telephone service provided by the telephone services network
• CPC Class Codes: H04W 36/1443 between licensed networks
• CPC Class Codes: H04W 76/22 Manipulation of transport tunnels
• CPC Class Codes: H04W 88/00 Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices

Abstract

Devices, softwares methods hand off a live call from an original leg of a first modality (such as Circuit Switched Voice) to an alternate leg of another modality (such as Voice over Internet Protocol). An original leg of a call is established using the first modality. Then the alternate leg of the call is established using the second modality, while the first leg is still established. Then the call is handed off from the original leg to the alternate leg, while the connection is active.

Claims

1. A wireless telephone device comprising:

a physical component for wireless communication; and

a processor coupled with the physical component, in which the processor is adapted to

establish an original leg of a telephone call connection using one of a CSV modality and a VoX modality;

transfer data of a voice conversation between the original leg and a voice channel that terminates in one of a speaker and a microphone pursuant to the telephone call connection;

receive an address signal encoding an access address;

make a handoff call to the access address responsive to receiving the address signal;

establish from the handoff call an alternate leg of the telephone call connection using the other one of the two modalities while the original leg is still established; and

then transfer data of the voice conversation between the voice channel and the alternate leg pursuant to the telephone call connection.