Post answer call redirection via voice over IP

• US 7,567,555 B1
• Filed: 03/22/2004
• Issued: 07/28/2009
• Est. Priority Date: 03/22/2004
• Status: Active Grant

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Natarajan, Gautham, Peters, Robert Yaeger Jr., Samarasinghe, Harish, Dolly, Martin C., Ibezim, James, Ricciardi, Dominic
• Primary Examiner(s): Tsang; Fan
• Assistant Examiner(s): Hashem; Lisa
• Application Number:
  US10/805,758
• Time in Patent Office: 1,954 Days
• Field of Search: 370352-357, 370/395.52, 370/231, 370/236, 370/261, 379/158, 379/203.01, 379/205.01, 379/207.01
• US Class Current: 370/356
• CPC Class Codes: H04L 65/1083 In-session procedures
• CPC Class Codes: H04L 65/1094 Inter-user-equipment sessions transfer or sharing
• CPC Class Codes: H04L 65/1096 Supplementary features, e.g. call forwarding or call holding systems providing special services or facilities to telephony subscribers H04M3/42
• CPC Class Codes: H04M 2207/203 composed of PSTN and data network, e.g. the Internet
• CPC Class Codes: H04M 3/58 Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party substation line holding circuits H04M1/80

Abstract

A method is provided for forming a multi-media communication path between at least first, second and third communication devices coupled to a multi-media provider system during post answer call redirecting and/or teleconferencing. The method includes receiving and processing a first call request at a circuit-based portion of the multi-media provider system for forming a first communication link between the first and second communication devices. Thereafter, predetermined attributes of the first communication link may be sent to an IP-based portion of the multi-media provider system for configuring the IP-based portion of the multi-media provider system to process a subsequent request to execute post answer call redirecting and/or teleconferencing. Upon detecting the request to execute the post answer call redirecting and/or teleconferencing in the first communication link, the IP-based portion of the multi-media provider systems responds by forming the multi-media communication path between at least first, second and third communication devices.

Claims

1. A method for providing Post Answer Call Redirection (PACR) to provide capacity relief to an existing telecommunications network and to predetermined network elements, the method comprising:

a. receiving at a Border Element (BE) attributes associated with a telephone call established in a circuit switched network from a calling party;

b. transmitting a message from the Border Element to a Call Control Element (CCE) to a Service Broker (SB) to an Application Server (AS) to a Media Server (MS), wherein a first query message is received by the AS without having been routed through a circuit-based portion of the existing telecommunications network and including a circuit switch, a circuit service control point (SCP), and a circuit adjunct;

c. receiving at a Border Element instructions for PACR from the AS;

d. providing PACR, via a combination of the AS, the MS, the BE, and the CCE without accessing the circuit switch, the circuit SCP, or the circuit adjunct; and

e. after receiving PACR, routing a re-directed telephone call without accessing the circuit switch, the circuit SCP and the circuit adjunct.