Network phone system and method having dynamic gain control function

Network phone system and method having dynamic gain control function

  • CN 1,523,868 B
  • Filed: 02/17/2004
  • Issued: 07/04/2012
  • Est. Priority Date: 02/17/2003
  • Status: Active Grant
First Claim
Patent Images

1. VoIP system with dynamic gain controlled function and first terminal and second communication between terminals path;

  • First terminal is the extension telephone of private branch exchange system;

    And second terminal is to carry out operation types according to Internet Protocol;

    This communication path comprise the voip gateway that links to each other with said private branch exchange system and be connected in said voip gateway and second terminal between the gatekeeper, said VoIP system comprises;

    Said private branch exchange system;

    Be used for when the call set-up signal that receives from extension;

    Make telephonic extension confirm phone type;

    Use the telephone number of receiving terminal to confirm the type of receiving terminal, and will send to said voip gateway according to the yield value of phone type of confirming and the distribution of receiving terminal type;

    AndSaid voip gateway, be used to receive yield value, store this gain from private branch exchange system, according to the yield value of storage amplify the pulse code modulation speech data that sends by private branch exchange system, with the pulse code modulation speech data that amplifies convert into VoIP divide into groups, with this VoIP divide into groups to send to second terminal, will be the pulse code modulation speech data by the VoIP packet switched that send at said second terminal, first terminal of amplifying the pulse code modulation speech data of conversion and the pulse code modulation speech data that amplifies being sent to said private branch exchange system according to the yield value of storage;

    Wherein said private branch exchange system comprises the gain table of the yield value that is used for definite magnification ratio;

    Each said yield value is that simulation extension telephone or digital extension telephone and said second terminal are IP or another voip gateway based on said first terminal, and yield value is sent to said voip gateway from said private branch exchange system.

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