Patent ID: 6243442
Filing Date: 2001-06-05
Classification: H04M,H04Q

Abstract:
A telephone exchange apparatus capable of transmitting an emergency call signal carrying caller information, the apparatus comprising:a control section for receiving an emergency call request from at least one extension telephone terminal;a PCM highway for transmitting tone data;a data highway for transmitting control information data; andan interface control section, comprisingMF signal generating means for generating MF tone data in response to the control information data received from the data highway,a control section interface for transmitting the MF tone data between the PCM highway and an external line, anda processor for controlling the MF signal generating means and capturing the external line in response to a request from the control section;wherein the control section controls generating emergency call data upon inputting a dial signal of the emergency call request from said extension telephone terminal, transmitting the generated emergency call data to said MF signal generating means to generate the emergency call MF tone data, sending the emergency call MF tone data generated by said MF signal generating means to said control section interface, and transmitting an emergency call MF tone signal over the external line.