Interface circuit module of magneto exchange and city telephone and control method thereof

Abstract

The invention provides an interface circuit module of a magneto exchange and city telephone and a control method thereof. The interface circuit module comprises a ring current module, a relay set, a single chip microcomputer, a ringing detection module and a thick film circuit, wherein the ring current module is used to provide ringing signals; the relay set is composed of a plurality of relays and used to select a connecting path; the single chip microcomputer is used to realize program control and control each relay to control circuit connection and ensure that the city telephone works in a calling state or a called state; the ringing detection module is used to detect the ringing signals; and the thick film circuit is used to be connected with the interface of the city telephone and is divided into a calling thick film circuit and a called thick film circuit. The interface circuit module of the invention can be arranged in the magneto exchange or be used as an external independent module. By utilizing the interface circuit module of the invention, the ordinary telephone or video telephone can be used to realize connections and conversations between the magneto exchange operator and the user and between users; and the defect that the magneto exchange can only be used in the magneto telephone is overcome, thus the application fields of the magneto telephone are expanded.

Description

technical field [0001] The invention relates to an interface circuit module and a control method for connecting a magnet exchange and a local telephone, and is also applicable to the connection between a magnet exchange and a videophone. Background technique [0002] The magnet switch is a manual telephone switch for users equipped with magnet telephones to exchange calls. Its main features are: the battery is installed near each telephone; the user and the operator use a hand-cranked generator to ring to call each other. The magnetic switch is simple in structure, easy to produce, low in price, and can work with dry batteries; it has low requirements on lines, and is suitable for areas where the traffic is not busy and there are few users, such as small towns, rural areas, mines, and the army. [0003] At present, the application of magnet switches in our country is limited to the connection between magnet telephones to achieve communication. In the absence of dedicated ma...

AI Technical Summary

Problems solved by technology

[0003] At present, the application of magnet switches in our country is limited to the connection with magnet telephones to achieve calls. In the absence of dedicated magnet telephones or damage to magnet telephones, it will cause accidents that cannot be connected or the connection is interrupted, and the purpose of communication between the two parties cannot be achieved.

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