Patents by Inventor Liangtian Wang

Liangtian Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Interface card and CTI system applying interface card
    Patent number: 7746850
    Abstract: This invention discloses an interface card built in each single unit of a CTI system and connected to the Voice Processing Unit (VPU) of the single unit via local CT-BUS. On the transmitting side of an interface card, low-speed signals from the VPU in the single unit are multiplexed into a single high-speed signal and converted into LVDS signals. On the receiving side of the interface card, external high-speed LVDS signals are converted into low voltage TTL signals, demultiplexed into local CT-BUS compatible low-speed signals and sent to the VPU in the single unit. The invention also discloses a CTI system applying the interface card. The interface card and the CTI system applying the interface card feature low cost, simple and reliable connection, easy installation and operation, high reliability, large channel capacity and good expandability.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: June 29, 2010
    Assignee: Shenzhen Donjin Communication Tech Co., Ltd.
    Inventors: Yongkun Liao, Liangtian Wang
  • Interface Card and Cti System Applying Interface Cards
    Publication number: 20080133805
    Abstract: This invention discloses an interface card built in each single unit of a CTI system and connected to the Voice Processing Unit (VPU) of the single unit via local CT-BUS. On the transmitting side of an interface card, low-speed signals from the VPU in the single unit are multiplexed into a single high-speed signal and converted into LVDS signals. On the receiving side of the interface card, external high-speed LVDS signals are converted into low voltage TTL signals, demultiplexed into local CT-BUS compatible low-speed signals and sent to the VPU in the single unit. The invention also discloses a CTI system applying the interface card. The interface card and the CTI system applying the interface card feature low cost, simple and reliable connection, easy installation and operation, high reliability, large channel capacity and good expandability.
    Type: Application
    Filed: June 30, 2006
    Publication date: June 5, 2008
    Applicant: Shenzhen Donjin Communication Tech Co., Ltd.
    Inventors: Yongkun Liao, Liangtian Wang