Patents Assigned to Planum Technology Corp.
  • Patent number: 4768221
    Abstract: A device for remotely controlling call forwarding for a given telephone line. The device includes a detection circuit for detecting an incoming call to the given telephone line. If it detects only one or two signals indicating a previous call forwarding initiate setting, it automatically terminates call forwarding and awaits input of a new call forwarding telephone number followed by a security code. If it detects more than four rings, it knows that the call forwarding was not enabled and it is ready to accept the new call forwarding number remotely input along with the security code. After receiving successfully the remotely inserted call forwarding number and security code, it proceeds to reprogram the system with the new call forwarding number. Should any unauthorized user be using the system, it will reprogram with the previously stored call forwarding number.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: August 30, 1988
    Assignee: Planum Technology Corp.
    Inventors: Dan Green, Sandor Goldner