KR960027950A - Interlinking device of parallel connected telephone and its method - Google Patents

Abstract

The present invention relates to a cross-calling device and a method of a parallel-connected telephone, comprising: a wired loop detector for detecting whether a loop of a user telephone is 'on' or 'off' and generating a signal accordingly; A D.M.F receiver which detects that a specific button (for example, a "#", * "button) is input for a user to call another user's telephone, and generates a control signal for calling another telephone. A call sound generating unit for outputting data on a ring tone for calling another telephone, a hook detecting unit for detecting a hook between a speaker for generating a ringing tone and another user telephone, and a telephone loop control unit for controlling a loop of the other telephone. Therefore, the present invention provides a ring tone to another user's phone without the need for the user to verbally call the other user by simply changing the algorithm and hardware functions to call the other user during the call. There is an advantage that can be generated and called.

Description

Interlinking device of parallel connected telephone and its method

Since this is an open matter, no full text was included.

1 is a block diagram of a cross-calling apparatus of a parallel-connected telephone according to the present invention, and FIG. 2 is a flowchart of a cross-calling method of a parallel-connected telephone according to the control of FIG.

Claims (2)

A user telephone on which a call is currently being made by the user; Another user's telephone connected in parallel with the same telephone line to the user's telephone; A second telephone loop detector for detecting whether the loop of the user telephone is 'on' or 'off' and generating a signal accordingly; A D.M.F receiver which detects that a specific button (for example, a "#", * "button) is input for the user to call the other user's telephone, and the other telephone loop detection unit and the D.T. A control unit for generating a control signal for calling another telephone by receiving a signal from an M.F detector, a ringing tone generator for outputting data on a ringing tone for calling another telephone by the control signal of the control unit; A speaker for generating a ring tone to the outside by receiving negative ring tone data, a hook detecting unit for detecting a hook of another user's telephone after the ringing tone is generated from the speaker, and receiving a hook detection signal of the hook detecting unit to perform a loop of another telephone. Intercalling device of a parallel-connected telephone comprising a telephone loop control unit for controlling. What is claimed is: 1. A method of calling each other in parallel; Detecting whether the loop of the user telephone is 'off' and restarting if 'off'; When the loop of the user's phone is 'on' in the above step, operating the D & F receiver to detect that a specific button (for example, a "#", * "button) is input; Determining whether a signal for calling the other user's phone is input after the D.M.F receiver is operated, and restarting when the signal for calling the other user's phone is not input; Generating a ringing tone externally when a signal is input, detecting whether the hook of the other user's phone is 'off' in the step; A step of stopping the occurrence of a predetermined number of times by determining whether a ring tone is generated a predetermined number of times when the hook of another user's telephone is 'on' If the previous step, and such that the ring-back tone continues to occur; inter-call manner for the parallel connected telephones including a step in which when the occurrence of the ringing tone in the step reaches a predetermined number of times to stop the generation of the call sound and restart. ※ Note: The disclosure is based on the initial application.