Patent ID: 6934374
Filing Date: 2005-08-23
Classification: H04L

Abstract:
1. A data communication system comprising: a plurality of terminals connected to a telephone line including a switched telephone network for use in a caller number identification and display service; sender number detecting/informing means for connecting with said switched telephone network, and for detecting and subsequently informing a sender telephone number informed by said telephone line; and a host computer for receiving said sender telephone number and connecting with said switched telephone network, and subsequently initiating a data communication with said plurality of terminals, wherein said plurality of terminals each have their own ID codes to distinguish one of said terminal from others, and wherein said host computer comprises registration means for registering said ID codes and sender telephone numbers corresponding to said ID codes; determination means for comparing said sender telephone number informed by said sender number detecting/informing means with said sender telephone numbers registered by said registration means, and for subsequently determining whether said sender telephone number is coincident with any of said registered sender telephone numbers; and communication control means for controlling data communication process steps through said sender telephone number detecting/informing means based on a result obtained by a comparison with said determination means.