×

Switching system for providing an improved call waiting service

  • US 6,490,348 B1
  • Filed: 07/28/1999
  • Issued: 12/03/2002
  • Est. Priority Date: 01/19/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. A switching system which interconnects a first telephone, a second telephone and a third telephone through circuit switching, comprising:

  • an interrupt notification unit which enables the first telephone, when a dial tone is being sent to the first telephone prior to dialing of a phone number of the second telephone, to notify its user of an incoming call from the third telephone; and

    an interrupt call control unit which enables a connection between the first telephone and the third telephone to be established when a predetermined number for accepting the incoming call is dialed on the first telephone after the notification of the incoming call.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×