The method of listening dailed signal sound at dail line terminal during network interworking

The method of listening dailed signal sound at dail line terminal during network interworking

  • CN 100,563,282 C
  • Filed: 05/29/2005
  • Issued: 11/25/2009
  • Est. Priority Date: 05/29/2005
  • Status: Active Grant
First Claim
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1. the method for listening dailed signal sound at dail line terminal during a network interworking, be applied to the packet-based core networks of Session initiation Protocol as call control signalling, these packet-based core networks insert the traditional circuit domain network by the media gateway controlling unit, by network insertion node access user terminalIt is characterized in that described method comprises following steps:

  • When described media gateway controlling unit was received and finished message or call progress message from the address of traditional circuit domain network, indicating media gateway was opened the Media Stream passage;

    Calling subscriber'"'"'s medium control device is judged the media negotiation whether " providing/reply " pattern has been provided before this, if then open the Media Stream passage when receiving the ring response message.

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