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Method for collect call service based on voip technology and system thereof

  • US 9,832,321 B2
  • Filed: 06/02/2013
  • Issued: 11/28/2017
  • Est. Priority Date: 11/14/2002
  • Status: Active Grant
First Claim
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1. A post-paid collect call system based on voice over Internet protocol (VoIP), comprising:

  • a calling gateway configured to receive a collect call request, the collect call request generated by a caller telephone, the collect call request including a collect call identifier and a phone number of a called terminal, wherein the calling gateway and caller telephone are included in a VoIP network compatible with one of H.323 Protocol, Session Initiation Protocol (SIP), and Media Gateway Control Protocol (MGCP);

    a called gateway configured to receive the collect call request via the VoIP network; and

    a collect call switch, wherein the collect call switch is in a Public Switched Telephone Network (PTSN), and the collect call switch is configured to;

    a) establish a first communication link only between the collect call switch and the called gateway upon receiving the collect call request from the caller telephone, the first communication link having a first endpoint and a second endpoint, wherein the first endpoint is connected to the collect call switch and the second endpoint is connected to the called gateway;

    b) subsequent to establishing the first communication link, establish a second communication link via the PTSN between the collect call switch and the called terminal;

    c) transmit a caller identification to the called terminal when the second communication link is established; and

    d) connect the first communication link and the second communication link based on a collect call acceptance from the called terminal to establish a voice call link between the caller telephone and the called terminal;

    wherein the collect call switch is further configured to determine a collect call toll only for the second communication link and to initiate a billing process responsive to the collect call acceptance.

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