KR100194463B1 - Interface port switching circuit and method according to connected telephone in key phone telephone system - Google Patents

Abstract

end. The technical field to which the claimed invention belongs

It is a technology that automatically connects to a subscriber phone port or a subscriber phone port of a key phone according to the type of the phone connected to the hybrid port in the key phone telephone system.

I. The technical problem to be solved by the invention

Depending on the type of phone connected to the hybrid port when the keyphone system is installed, the installer can open the main housing cover of the keyphone system and automatically connect the manual phone port to the keyphone phone port or the general phone port.

All. Summary of Solution of the Invention

The main device of the key phone system periodically performs data communication with the phone connected to the hybrid port, and when the data communication is normally performed, the phone connected to the hybrid port is recognized as the key phone phone, and the hybrid port is automatically connected to the key phone phone matching circuit. When the data communication is not performed normally, the phone connected to the hybrid port is recognized as a general telephone and automatically switches the hybrid port to a general telephone matching circuit.

la. Important uses of the invention

Applies to key phone system.

Description

Interface port switching circuit and method according to connected telephone in key phone telephone system

The present invention relates to an interface port connection circuit and method according to a connection telephone of a key phone telephone system, and in particular, an interface port switching circuit for detecting a type of connection telephone in a key telephone telephone system and connecting to a key phone telephone subscriber port or a general telephone subscriber port; It is about a method.

In general, in a key phone system, a key phone or a general phone is connected to the main device of the key phone system. In this case, ports for connecting the key phone or general phone are separated.

1 is an interface port switching circuit diagram of a conventional key phone system.

CPU 18 controls the overall operation of the key phone system. Hybrid port 10 is a port for connecting a general telephone 20 or key phone 22. The general telephone 20 is connected to the hybrid port 10 with two lines for each ordinary telephone, and the key telephone telephone 22 is connected to the hybrid port 10 with two or four lines for each key telephone telephone. When installing the key phone system, depending on the type of the phone connected to the hybrid port 10, the manual switch 12 must be operated to connect the key phone telephone matching circuit 14 or the general phone matching circuit 16 to use the general telephone 20 or the key phone telephone 22 connected to the hybrid port 10. Can be. If the general phone 20 connected to the hybrid port 10 is connected to the key phone telephone matching circuit 14 or the key phone phone 22 connected to the hybrid port 10 is connected to the general phone matching circuit 16, the general phone 20 or the key phone telephone 22 cannot be used. The general telephone 20 connected to the port 10 must be connected to the general telephone matching circuit 16, and the key phone telephone 22 connected to the hybrid port 10 must be connected to the key telephone telephone matching circuit 14.

According to the type of telephone connected to the hybrid port in the conventional keyphone system, that is, a general telephone or a telephone telephone, the installer must open the main unit housing cover of the telephone system and operate the manual switch 12 to connect to the telephone telephone port or the telephone port. So there was a troublesome problem.

Therefore, an object of the present invention is to detect the type of the phone connected to the hybrid port to solve the above problems and automatically connected to a telephone telephone system of a telephone telephone system to connect a regular telephone or key phone telephone with a regular telephone matching circuit or a telephone telephone matching circuit An interface port switching circuit and method are provided.

The present invention for achieving the above object, the main device of the key phone system periodically performs data communication with the phone connected to the hybrid port and when the data communication is normally performed, the phone connected to the hybrid port is recognized as a key phone telephone automatically The hybrid port is connected to a key phone telephone matching circuit, and when the data communication is not performed normally, the telephone connected to the hybrid port is recognized as a general telephone and automatically switches the hybrid port to a general telephone matching circuit. do.

1 is an interface port switching circuit diagram of a conventional key phone system

2 is an interface port switching circuit diagram in a key phone system according to an embodiment of the present invention.

Figure 3 is a flow chart of the interface port switching control according to the connection telephone of the embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is an interface port switching circuit diagram in a key phone system according to an embodiment of the present invention.

Hybrid port 30 is a port for connecting a telephone phone 44 and a general telephone 42 in a key phone system. The CPU 38 detects the type of the connected telephone by data communication with the telephone connected to the hybrid port 30 and outputs a control signal for switching the interface port. The relay driver 40 drives the relay 32 according to the control signal of the CPU 38 to connect a telephone connected to the hybrid port 30 to a key phone telephone port 34 or a general telephone matching circuit 36.

3 is a flow chart of the interface port switching control according to the connection telephone of the embodiment of the present invention.

2 and 3 will be described in detail the operation of the preferred embodiment of the present invention.

Hybrid port 30 is a port for connecting a general telephone 42 or key phone 44. The general telephone 42 is connected to the hybrid port 30 with two lines for each ordinary telephone, and the key telephone telephone 44 is connected with the hybrid port 30 with four lines for each one of the telephone phones. The CPU 38 controls the relay 32 at system initialization to connect the hybrid port 30 to the key phone matching circuit 34. In step 101, the CPU 38 periodically attempts to communicate data through the key phone matching circuit 34, the relay 32, and the hybrid port 30. Then, in step 102, it is checked whether data communication is normally performed. At this time, the CPU 38 transmits a communication request signal (REQ) through the hybrid port 30, and if there is an answer signal (ACK) from the phone connected to the hybrid port 30, the data communication is normally performed with the key phone telephone 44. Recognize that the phone 44 is connected. As a result, the CPU 38 controls the relay driver 40 in step 103 such that the relay 32 is connected to the key phone telephone matching circuit 34 connected to the hybrid port 30. However, since the CPU 38 transmits the communication request signal (REQ) through the hybrid port 30 through data communication in step 101, if there is no response signal (ACK) from the phone connected to the hybrid port 30, the data communication is not performed. The telephone is not connected to 30 or the telephone 40 is connected. As a result, the CPU 38 controls the relay driver 40 in step 104 to control the relay 32 to connect the hybrid port 30 to the general telephone matching circuit 36. The CPU 38 detects the type of the phone and outputs a control signal for switching the interface port. Then, the relay driver 40 drives the relay 32 under the control of the CPU 38 to connect the hybrid port 30 to the key phone telephone matching circuit 34 or the general telephone matching circuit 36.

As described above, the present invention detects the type of telephone connected to the hybrid port by performing data communication through the hybrid port in the key phone main unit, and automatically connects it to the general phone matching circuit or the key phone telephone matching circuit. Depending on the type of phone that is open and connected to the hybrid port, there is an advantage that can be eliminated the need to manually connect to the key phone telephone matching circuit or a regular telephone matching circuit.

Claims (5)

In a key phone system, A hybrid port for connecting a key phone and a general phone in the key phone system; A control unit for detecting a type of connection telephone by periodic data communication with a telephone connected to the hybrid port and outputting a control signal for switching an interface port; Switching the interface port according to the connected telephone in the key phone system, comprising a relay driver for driving a relay by the control signal of the controller to connect the telephone connected to the hybrid port to a key phone telephone port or a general telephone matching circuit. Circuit. The method of claim 1, The relay driving unit drives the relay so that the hybrid port is connected to a key-phone telephone matching circuit when the key-phone telephone is connected to the hybrid port by a control signal of the controller. Switching circuit. The control unit periodically transmits a data communication request signal through the hybrid port, and when there is a response signal, the phone connected to the hybrid port recognizes as a key phone telephone. Circuit. In the method of switching the interface port according to the type of the phone connected to the hybrid port in the key phone system, Periodically performing data communication with a telephone connected to the hybrid port in a main device of the key phone system; When the data communication is normally performed in the data communication process, the phone connected to the hybrid port is recognized as a key phone telephone, and the hybrid phone is automatically connected to the key phone telephone matching circuit. How to switch interface port according to. The method of claim 4, wherein When the data communication is not normally performed in the data communication process, the telephone connected to the hybrid port is recognized as a general telephone and automatically switches the hybrid port to a general telephone matching circuit. How to switch interface port according to.