CN201491087U - An interface circuit module between a magnet switch and a local telephone - Google Patents

Abstract

The utility model provides an interface circuit module between a magnet exchange and a local telephone. The module includes: a ringing current module, used to provide ringing signals; a relay group, composed of multiple relays, used to select the connection path; a single-chip microcomputer, used to realize program control, to control the circuit connection by controlling each relay, Make the local phone work in two states of calling and called; the ringing detection module is used to detect the ringing signal; the thick film circuit is used to realize the interface connection with the local phone, which is divided into the calling thick film circuit and the called called a thick film circuit. The interface circuit module of the utility model can be installed inside the magnet switch, and can also be used as an external independent module. Utilizing the interface circuit module of the utility model can realize the connection and communication between the operator of the magnet switch and the user, and between the user and the user by using an ordinary telephone or a videophone, which solves the disadvantage that the magnet switch can only be used with a magnet telephone, and expands its application field .

Description

An interface circuit module between a magnet switch and a local telephone

technical field

The utility model relates to an interface circuit module used for connecting a magnet switchboard with a local telephone, and is also suitable for the connection between a magnet switchboard and a videophone.

Background technique

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.

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 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.

Contents of the invention

The purpose of the utility model is to provide an interface circuit module between a magnet exchange and a local telephone and a control method thereof. Through this interface circuit module, the connection between the magnetic switch and the ordinary local telephone can be realized, that is, the connection and communication function between the magnetic switch operator and the user, and between the user and the user can be performed by using an ordinary local telephone or a videophone, which solves the problem of the magnetic switch. Only the drawbacks of the magnet telephone set can be applied, and the application field of the magnet switch is expanded.

Thus, the interface circuit module between the magnet switch and the local telephone of the present invention includes: a ringing current module, a relay group, a single-chip microcomputer, a ringing detection module and a thick film circuit. Wherein, the ring current module is used to provide a ring signal; the relay group is composed of a plurality of relays for selecting a connection path; , so that the local phone can successfully work in two states of calling and called; the ring detection module is used to detect the ringing signal; the thick film circuit is used to realize the interface connection with the local phone, which is divided into calling There are two parts called thick film circuit and thick film circuit. When the module is connected with the magnet switch and the local telephone, the T terminal of the switch is connected with the relay in the relay group, the R terminal of the switch is directly connected with the R terminal of the local telephone, and the T terminal of the local telephone is connected with the relay group The different relay connections in .

Here, the T terminal refers to the TIP terminal, and the R terminal refers to the RING terminal. Respectively represent the two wires that make up the telephone wiring circuit. Tip is another name for the positive wire; Ring is another name for the negative wire.

In addition, the relay group can be composed of 3 to 4 relays, which can be combined according to actual needs.

When the phone in use is in the calling state: the user picks up the hook, the voltage at both ends of T and R of the calling thick-film circuit changes from low to high, the calling thick-film circuit outputs a high level, and the single-chip microcomputer detects that the calling thick-film circuit outputs After the high level, change the state of the corresponding relay, connect the ring current module to the T terminal and the R terminal of the switch, and the ring current module will ring the switch. After a delay of two seconds, change the state of the corresponding relay, and connect the local phone to The ring current module is disconnected, and at the same time, the T terminal R of the local phone is connected to the T terminal R of the exchange. At this time, the exchange detects the ringing signal and gives the user a dial tone, and the user can dial to realize communication with other users or The call connection between the operators; after the call ends, the user hangs up, changes the state of the corresponding relay again, and disconnects the connection between the T terminal of the local telephone and the T terminal of the switch.

When the phone used is in the called state: other users or operators call the user, the ringing detection module detects the ringing signal and outputs a low level, after the single-chip microcomputer detects the low level output by the ringing detection module, it changes the corresponding relay state, disconnect the ring detection module from the switch, and at the same time, connect the local phone to the switch and disconnect it from the called thick film circuit, with a delay of ten seconds. After the bell signal is over, change the state of the corresponding relay again so that the T terminal and R terminal of the local telephone are connected with the T terminal R of the exchange respectively, and the user can communicate with other users or the operator who dialed in; after the call ends, the user hangs up, and then By changing the state of the corresponding relay, disconnect the T terminal of the local telephone and the T terminal of the exchange.

The beneficial effect of the interface circuit module of the magnet switchboard of the present utility model and the local telephone is:

(1) Adopting the interface circuit module does not need to change the internal circuit and structure of the original magnet switch, and maintains the electrical and mechanical properties of the original magnet switch.

(2) The interface circuit module is small in size and strong in practicability. It can be installed inside the magnet switch or used as an independent module, which is convenient to use.

(3) Since the interface circuit module can be used independently with the local telephone, it does not affect the normal conversation between the magnet exchange and the dedicated magnet telephone user.

(4) The interface circuit module has strong application flexibility. When using the magnet switch, it can not only realize the call between the user of the local phone (including videophone) and the user of the magnet phone, but also realize the communication between the user of the local phone (including videophone) A call between a user and a local phone user.

Description of drawings

Fig. 1 is a schematic diagram of the system structure in which the interface circuit module connected to the magnetic switch and the local telephone of the present invention is connected to the switch and the local telephone.

Fig. 2 is a schematic diagram of the call flow of the interface circuit module connecting the magnet switch and the local telephone of the present invention.

Fig. 3 is a schematic diagram of the calling process of the interface circuit module connected between the magnet switch and the local telephone of the present invention.

Detailed ways

The interface circuit module connecting the magnetic switch and the local telephone of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the system structure in which the interface circuit module connected to the magnetic switch and the local telephone of the present invention is connected to the switch and the local telephone. As shown in Fig. 1, the interface circuit module connected between the magnetic switch of the present invention and the local telephone includes: a ringing current module, a relay group, a single-chip microcomputer, a ringing detection module and a thick film circuit. Wherein, the ring current module is used to provide a ring signal; the relay group is composed of a plurality of relays for selecting a connection path; , so that the local phone can successfully work in two states of calling and called; the ring detection module is used to detect the ringing signal; the thick film circuit is used to realize the interface connection with the local phone, which is divided into calling There are two parts called thick film circuit and thick film circuit. When the module is connected with the magnet switch and the local telephone, the T terminal of the switch is connected with the relay in the relay group, the R terminal of the switch is directly connected with the R terminal of the local telephone, and the T terminal of the local telephone is connected with the relay group The different relay connections in .

Here, the T terminal refers to the TIP terminal, and the R terminal refers to the RING terminal. Respectively represent the two wires that make up the telephone wiring circuit. Tip is another name for the positive wire; Ring is another name for the negative wire.

In addition, the above relay group can be composed of 3 to 4 relays, which can be combined according to actual needs.

When the phone in use is in the calling state: the user picks up the hook, the voltage at both ends of T and R of the calling thick-film circuit changes from low to high, the calling thick-film circuit outputs a high level, and the single-chip microcomputer detects that the calling thick-film circuit outputs After the high level, change the state of the corresponding relay, connect the ring current module to the T terminal and the R terminal of the switch, and the ring current module will ring the switch. After a delay of two seconds, change the state of the corresponding relay, and connect the local phone to The ring current module is disconnected, and at the same time, the T terminal R of the local phone is connected to the T terminal R of the exchange. At this time, the exchange detects the ringing signal and gives the user a dial tone, and the user can dial to realize communication with other users or The call connection between the operators; after the call ends, the user hangs up, changes the state of the corresponding relay again, and disconnects the connection between the T terminal of the local telephone and the T terminal of the switch.

When the phone used is in the called state: other users or operators call the user, the ringing detection module detects the ringing signal and outputs a low level, after the single-chip microcomputer detects the low level output by the ringing detection module, it changes the corresponding relay state, disconnect the ring detection module from the switch, and at the same time, connect the local phone to the switch and disconnect it from the called thick film circuit, with a delay of ten seconds. After the bell signal is over, change the state of the corresponding relay again so that the T terminal and R terminal of the local telephone are connected with the T terminal R of the exchange respectively, and the user can communicate with other users or the operator who dialed in; after the call ends, the user hangs up, and then By changing the state of the corresponding relay, disconnect the T terminal of the local telephone and the T terminal of the exchange.

Fig. 2 is a schematic diagram of the call flow of the interface circuit module connecting the magnet switch and the local telephone of the present invention. Fig. 3 is a schematic diagram of the calling process of the interface circuit module connected between the magnet switch and the local telephone of the present invention. As shown in Fig. 2 and Fig. 3, the interface circuit module of the magnet switch and the local telephone provided by the utility model includes two parts of the calling control process and the called control process in its working state.

Execute the caller control process when the phone in use is in the calling state:

1) When the user picks up the phone, the voltage at both ends of T and R of the calling thick-film circuit changes from low to high, and the calling thick-film circuit outputs a high level;

2) After the single-chip microcomputer detects the high level output by the thick-film circuit of the calling party, it changes the state of the corresponding relay, so that the ringing current module is connected with the T terminal and the R terminal of the switch, and the ringing current module rings the switch;

3) After a delay of two seconds, disconnect the local phone from the ring current module by changing the state of the corresponding relay. At the same time, connect the T terminal R of the local phone to the T terminal R of the switch. After the ring signal, the user will be given a dial tone, and the user can dial to realize the call connection with other users or the operator;

4) After the call ends, the user hangs up, changes the state of the corresponding relay again, and disconnects the connection between the T terminal of the local telephone and the T terminal of the exchange.

Execute the called control process when the phone in use is in the called state:

1) When other users or operators call the user, the ringing detection module outputs a low level after detecting the ringing signal;

2) After the single-chip microcomputer detects the low level output by the ringing detection module, by changing the state of the corresponding relay, disconnect the connection between the ringing detection module and the switch, and at the same time, make the local phone communicate with the switch and connect with the called thick-film circuit disconnect;

3) Delay for ten seconds. During this period of time, the user can perform off-hook operations. After the ringing signal is over, change the state of the corresponding relay again, so that the T-terminal and R-terminal of the local telephone are connected with the T-terminal and R-terminal of the exchange respectively, and Connect the local phone and switchboard with the called thick film circuit, and the user can talk with other users or operators who dial in;

4) After the call ends, the user hangs up, and then disconnects the connection between the T terminal of the local telephone and the T terminal of the exchange by changing the state of the corresponding relay.

Example

The interface circuit module connecting the magnetic switch and the local telephone of the present invention will be further described in detail through specific embodiments below.

As shown in Fig. 1, the interface circuit module connected between the magnetic exchange of the present invention and the local telephone is composed of, for example, a ringing current module, a relay group, a single-chip microcomputer, a ringing detection module and a thick film circuit. Among them, the ring current module is used to provide the ringing signal; the relay group is composed of 4 eight-pin relays V1~V4, which are used to select the connection path; the single-chip microcomputer is used to realize the program control, and control the circuit connection by controlling each relay. The local phone can successfully work in both calling and called states; the ringing detection module is used to detect the ringing signal; the thick film circuit is used to realize the interface connection with the local phone, which is divided into calling thick film circuit and called It is called two parts of thick film circuit. When the interface circuit module of the present utility model is connected with the exchange and the local telephone, the R terminal of the exchange is connected with the R terminal of the local telephone, but the two T terminals are not connected, and the T terminals of the exchange and the local telephone are respectively connected to different on the relay.

Execute the caller control process when the phone in use is in the calling state:

1) When the user picks up the phone, the voltage at both ends of T and R of the calling thick-film circuit changes from low to high, and the calling thick-film circuit outputs a high level;

2) After the single-chip microcomputer detects the high level output by the calling thick film circuit, it changes the state of relay V3 to connect V3 (3-4, 8-7), and at the same time changes the state of relay V1 to connect V1 (3-4). Then the ringing current module is connected with the switches T and R at this time, and the ringing current module rings the switch;

3) After a delay of two seconds, change the state of relay V1, connect V1 (3-2), disconnect the local phone from the ring current module, and at the same time, connect the T terminal R of the local telephone to the T terminal R of the switch, and the switch detects After receiving the ringing signal, the user will be given a dial tone, and the user can dial to realize the call connection with other users or the operator;

4) After the call ends and the user hangs up, change the state of relay V1 again, connect V1 (3-4), and disconnect the connection between the T terminal of the local telephone and the T terminal of the switch.

Execute the called control process when the phone in use is in the called state:

1) When another user or operator calls the user, the ringing detection module detects the ringing signal and outputs a low level;

2) After the single-chip microcomputer detects the low level output by the ringing detection module, it changes the state of the relay V3, connects V3 (3-4, 8-7), disconnects the connection between the ringing detection module and the switch, and at the same time, makes the city The phone is connected to the exchange, but disconnected from the called thick film circuit, then change the state of relay V4 to connect V4 (3-4), change the state of relay V2 to connect V2 (3-4);

3) Delay for ten seconds. During this period, the user can perform off-hook operation. After the ringing signal is over, change the state of relay V4 again to connect V4 (3-2), and the T terminal and R terminal of the local phone are connected to the switch The T terminal and the R terminal are connected separately, and the user can communicate with other users or operators who dial in;

4) After the call ends, the user hangs up, changes the state of relay V1, connects V1 (3-4), and disconnects the connection between the T terminal of the local telephone and the T terminal of the switch.

In summary, using the interface circuit module connecting the magnet switch and the local telephone of the utility model, the connection between the magnet switch and the local telephone can be realized, and the magnet switch operator and the user can be connected by using an ordinary local telephone or a videophone. The function of connecting and calling between users solves the disadvantage that the magnet switch can only be used with magnet phones, and expands the application field of the magnet switch.

Claims (5)

1. a kind of interface circuit module of magnetic switchboard and local telephone, it is characterized in that, comprises: ringing current module, relay group, single-chip microcomputer, ringing detection module and thick-film circuit form, Wherein, the ring current module is used to provide a ring signal; the relay group is composed of a plurality of relays for selecting a connection path; , so that the local phone can successfully work in two states of calling and called; the ring detection module is used to detect the ringing signal; the thick film circuit is used to realize the interface connection with the local phone, which is divided into calling There are two parts called thick film circuit and thick film circuit, When the interface circuit module is connected with the magnet switch and the local telephone, the R terminal of the switch is directly connected with the R terminal of the local telephone, and the two T terminals are not connected, and the T terminal of the exchange and the T terminal of the local telephone are respectively connected to the the different relay connections in the relay group, When the phone in use is in the calling state: the user picks up the hook, the voltage at both ends of T and R of the calling thick-film circuit changes from low to high, the calling thick-film circuit outputs a high level, and the single-chip microcomputer detects that the calling thick-film circuit outputs After the high level, change the state of the corresponding relay, connect the ring current module to the T terminal and the R terminal of the switch, and the ring current module will ring the switch. After a delay of two seconds, change the state of the corresponding relay, and connect the local phone to The ring current module is disconnected, and at the same time, the T terminal R of the local phone is connected to the T terminal R of the exchange. At this time, the exchange detects the ringing signal and gives the user a dial tone, and the user can dial to realize communication with other users or The call connection between the operators; after the call ends, the user hangs up, changes the state of the corresponding relay again, and disconnects the connection between the T terminal of the local telephone and the T terminal of the exchange; When the phone used is in the called state: other users or operators call the user, the ringing detection module detects the ringing signal and outputs a low level, after the single-chip microcomputer detects the low level output by the ringing detection module, it changes the corresponding relay state, disconnect the ring detection module from the switch, and at the same time, connect the local phone to the switch and disconnect it from the called thick film circuit, with a delay of ten seconds. After the bell signal is over, change the state of the corresponding relay again so that the T terminal and R terminal of the local telephone are connected with the T terminal R of the exchange respectively, and the user can communicate with other users or the operator who dialed in; after the call ends, the user hangs up, and then By changing the state of the corresponding relay, disconnect the T terminal of the local telephone and the T terminal of the exchange. 2. The interface circuit module between the magnet switch and the local telephone according to claim 1, wherein the interface circuit module is installed inside the magnet switch, or used as an external independent module. 3. The interface circuit module of the magnetic exchange and the local telephone according to claim 1, characterized in that the interface circuit module is connected with an ordinary telephone or a videophone and the magnetic exchange to realize communication. 4. The interface circuit module between a magnet switch and a local telephone according to any one of claims 1 to 3, wherein the relay group is composed of 3 to 4 relays, which are used in combination according to actual needs. 5. The interface circuit module between the magnet switch and the local telephone as claimed in claim 4, wherein the relay group is composed of 4 eight-pin relays V1～V4, When the telephone used is in the calling state: the user picks up the hook, and the calling thick-film circuit outputs a high level; after the single-chip microcomputer detects the high-level output of the calling thick-film circuit, it changes the state of the relay V3, so that the 3-4 of the relay V3 The terminals are connected to the 8-7 terminals respectively, and the state of the relay V1 is changed at the same time, so that the 3-4 terminals of the relay V1 are connected. At this time, the ring current module is connected with the switches T and R, and the ring current module rings the switch; after a delay of two seconds, Change the state of the relay V1, connect the 3-2 terminals of the relay V1, disconnect the local phone from the ring current module, and at the same time, connect the T terminal R of the local phone to the T terminal R of the switch respectively, and the switch will give a signal after detecting the ringing signal. User dial tone, the user can dial a number to realize the call connection with other users or operators; after the call ends, the user hangs up and changes the state of relay V1 again, so that the 3-4 terminals of relay V1 are connected, and the T terminal of the local telephone is disconnected from the The connection at the T-side of the switch, When the phone in use is in the called state: other users or operators call the user, the ringing detection module detects the ringing signal and outputs a low level; after the single-chip microcomputer detects the low level output by the ringing detection module, it changes the state of the relay V3 , connect the 3-4 terminals and 8-7 terminals of the relay V3, disconnect the ring detection module from the switch, and at the same time, connect the local phone to the switch and disconnect the called thick-film circuit, and then change the relay V4 connect the 3-4 terminals of the relay V4, change the state of the relay V2, and connect the 3-4 terminals of the relay V2; delay for ten seconds, the user can carry out the off-hook operation within this period of time, and wait for the ringing signal to end Finally, change the state of the relay V4 again, so that the 3-2 terminals of the relay V4 are connected, and the T terminal and the R terminal of the local telephone are respectively connected with the T terminal R of the switchboard, and the user can communicate with other users or operators who dial in; After the end, the user hangs up, changes the state of the relay V1, connects the 3-4 terminals of the relay V1, and disconnects the connection between the T terminal of the local telephone and the T terminal of the switch.

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