Signal conversion device and method for Autbus and telephone

Abstract

According to the signal conversion device and method for the Autbus bus and the telephone set, the signal conversion device for the Autbus bus and the telephone set is connected between the Autbus bus and the telephone set, so that the telephone set and the telephone set communicate through the Autbus bus under the cooperation of the signal conversion device; the signal conversion device receives a telephone signal of the telephone set, processes the telephone signal to obtain a packaged Autbus message, caches the Autbus message, and sends the Autbus message to an Autbus when obtaining an Autbus bus resource; and the signal conversion device receives the Autbus message of a specified time slot on the Autbus, processes the Autbus message, converts the Autbus message into a telephone signal again, and sends the telephone signal to the telephone set.

Description

Technical Field

[0001] The present application relates to the technical field of high-speed communication and audio transmission system communication, and in particular to a signal conversion device and method between an Autbus bus and a telephone. Background Art

[0002] Autbus is a two-wire non-bridge medium. It is a multi-node, high-bandwidth, time-sensitive industrial fieldbus. It is commonly used for the transmission and application of real-time data and non-real-time data in automated control industrial fields such as process control and discrete control, and is compatible with ISO / IEC / IEEE8802 Ethernet, IPv6 and other applications. Autbus has the characteristics of high bandwidth, high real-time, long distance, and high reliability transmission. The wiring and installation are simple and easy to maintain the network, and it supports the use of existing cables. Autbus uses bus networking to provide fixed bandwidth data services and variable bandwidth data services that support burst data through bus pre-configuration or dynamic application. Autbus can provide reliable and deterministic bearing for periodic sampling data, burst control, alarm, and IPv4 / IPv6 data in ISO / IEC / IEEE 8802 Ethernet format, and has the function of high-precision clock synchronization. It can provide deterministic data transmission services for time-sensitive and non-time-sensitive services based on time triggering. Therefore, Autbus is widely used in industrial control, automotive electronics, aviation, smart cities and other fields.

[0003] At present, telephones are networked using telephones and telephone switches. Each telephone needs to be connected to a telephone line from the telephone switch. If there are many telephones, or if adding or migrating telephones is troublesome, the structure is complex, time-consuming, labor-intensive, and requires high consumables and is difficult to maintain.

[0004] Although the Autbus bus is widely used, it has not been applied to the communication between telephones. Therefore, how to apply the Autbus bus to the communication between telephones to solve the existing telephone communication problems has become a problem that needs to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the present invention discloses a signal conversion device and method for Autbus and telephones, which does not require a telephone exchange, only requires twisted pair cables to connect all telephones to the Autbus through the signal conversion device, has a simple structure, low cost and convenient maintenance. The signal conversion device of the Autbus bus and the telephone of the present invention is connected between the Autbus bus and the telephone, so that the telephones communicate with each other through the Autbus bus in cooperation with the signal conversion device; The signal conversion device receives the telephone signal of the telephone, obtains the encapsulated Autbus message after processing, caches the Autbus message, and sends the Autbus message to the Autbus when obtaining the Autbus bus resource; The signal conversion device receives the Autbus message of the specified time slot on the Autbus bus, processes the Autbus message and reconverts it into a telephone signal and then sends it to the telephone.

[0006] A further improvement of the present invention is that the Autbus message includes a message header and a message length; the message header can be used to identify the type of the Autbus message; the message length can be used to identify the length of valid data in the Autbus message; The types of the Autbus messages are Autbus dialing messages, Autbus voice messages, and Autbus on-hook messages; the telephone signals include dialing signals, voice simulation signals, and on-hook signals.

[0007] A further improvement of the present invention is that when the signal conversion device encapsulates the Autbus message, it unpacks and encapsulates the Autbus message based on the maximum data that can be carried by a single time slot of the Autbus bus; after the Autbus message is unpacked and encapsulated, a terminator is set at the end of the Autbus message.

[0008] A further improvement of the present invention is that the signal conversion device includes an Autbus bus circuit, a data processing circuit, a dialing analysis circuit, a ringing trigger circuit, a voice analog-to-digital conversion circuit, a voice digital-to-analog conversion circuit, an on-hook circuit, and a telephone interface circuit; the Autbus bus circuit is connected to the Autbus bus; the Autbus bus circuit is connected to the data processing circuit, and the data processing circuit is respectively connected to the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion, the voice digital-to-analog conversion, and the on-hook circuit; the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion circuit, the voice digital-to-analog conversion circuit, and the on-hook circuit are respectively connected to the telephone interface circuit, and the telephone interface circuit is connected to the telephone.

[0009] The present invention also provides a method for a signal conversion device between an Autbus bus and a telephone set, the method being used for communication between telephone sets via the Autbus bus, wherein the telephone sets are all connected to the Autbus bus via a signal conversion device; wherein the telephone set that actively initiates communication is a calling telephone set, and the telephone set being called is a called telephone set; the signal conversion device connected to the calling telephone set is a first signal conversion device, and the signal conversion device connected to the called telephone set is a second signal conversion device; The method comprises the following steps: Step S1, dialing: the calling telephone makes a call, the dialing parsing circuit of the first signal conversion device identifies the called number according to the dialing signal of the calling telephone, the called number is temporarily stored in the designated address, and the data processing circuit of the first signal conversion device encapsulates the called number into an Autbus dialing message; Step S2, routing: the first signal conversion device sends the Autbus dial-up message to the Autbus bus, and the Autbus bus searches for the corresponding second signal conversion device according to the Autbus dial-up message; The data processing circuit of the second signal conversion device processes the Autbus dialing message. If it is determined to be a called telephone, the ringing trigger circuit of the second signal conversion device works to trigger the called telephone through the telephone interface circuit of the second signal conversion device. Step S3, establishing a connection: after the called telephone goes off-hook, a connection is established among the calling telephone, the first signal conversion device, the Autbus bus, the second signal conversion device and the called telephone; Step S4, transmitting voice data: The process of the calling telephone transmitting the voice analog signal to the called telephone is as follows: the voice analog signal output by the microphone of the calling telephone is encapsulated into an Autbus voice message by the first signal conversion device, and sent to the second signal conversion device via the Autbus bus, and the second signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the called telephone; The process of the called telephone transmitting the voice analog signal to the calling telephone is as follows: the voice analog signal output by the microphone of the called telephone is encapsulated into an Autbus voice message by the second signal conversion device and sent to the first signal conversion device via the Autbus bus; the first signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the calling telephone; Step S5, on-hook: When the calling telephone hangs up, the first signal conversion device converts the on-hook signal into an Autbus on-hook message and transfers it to the second signal conversion device via the Autbus bus, and the second signal conversion device regenerates the on-hook signal and transmits it to the called telephone; When the called telephone hangs up, the second signal conversion device converts the hang-up signal into an Autbus hang-up message and transfers it to the first signal conversion device through the Autbus bus. The first signal conversion device regenerates the hang-up signal and transmits it to the calling telephone.

[0010] A further improvement of the present invention is that in step S4, the specific steps of the calling telephone transmitting the voice analog signal to the called telephone are as follows: Step S41: The voice analog signal output by the microphone of the calling telephone is converted into voice data by the voice analog-to-digital conversion circuit of the first signal conversion device; Step S42: the data processing circuit of the first signal conversion device organizes the voice data into an Autbus voice message and caches it, and when obtaining the resources of the Autbus bus, sends the Autbus voice message to the Autbus bus; Step S43: the Autbus bus sends the Autbus voice message of the designated time slot to the second signal conversion device; Step S44: the data processing circuit of the second signal conversion device organizes the Autbus voice message into voice data, and sends it to the voice digital-to-analog conversion circuit of the second signal conversion device for data conversion to obtain a voice analog signal suitable for the called telephone to answer; Step S45: The voice analog signal suitable for the called telephone to answer is transmitted to the handset of the called telephone through the telephone interface circuit of the second signal conversion device to be answered.

[0011] A further improvement of the present invention is that in step S5, the specific steps when the calling telephone is on-hook are as follows: Step S51: After the calling telephone hangs up, the on-hook circuit of the first signal conversion device detects the on-hook signal and generates on-hook data; Step S52: After the on-hook data is processed by the data processing circuit of the first signal conversion device, an Autbus on-hook message is generated, and the Autbus on-hook message is sent to the Autbus bus through the Autbus bus circuit; Step S53: the Autbus bus sends an Autbus on-hook message of a designated time slot to the second signal conversion device; Step S54: the data processing circuit of the second signal conversion device analyzes and processes the Autbus on-hook message to obtain the on-hook data again; Step S55: the on-hook circuit of the second signal conversion device generates an on-hook signal suitable for the called telephone based on the retrieved on-hook data; Step S56: The on-hook signal suitable for the called telephone is transmitted to the called telephone by the telephone interface circuit of the second signal conversion device, the called telephone hangs up, and the communication between the calling telephone and the called telephone ends.

[0012] Beneficial effects of the present invention: The signal conversion device provided by the present invention can enable two or more telephones to communicate based on the Autbus bus, has a simple structure, is easy to use, and greatly improves the convenience of communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a connection diagram of the telephones of the present invention communicating with each other through the signal conversion device using the Autbus bus; Figure 2It is a functional block diagram of the Autbus bus and the signal conversion device of the present invention; Figure 3 Schematic diagram of a signal conversion device of the present invention. DETAILED DESCRIPTION

[0014] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0015] The invention discloses a signal conversion device for an Autbus bus and a telephone set, which does not require a telephone exchange and only requires twisted pair cables to connect all telephone sets to the Autbus bus through the signal conversion device, has a simple structure, low cost and convenient maintenance.

[0016] The Autbus system supports 254 valid nodes, one of which is a control node and the other nodes are end-user nodes. The control node is responsible for managing, allocating, and recycling system resources, and pushing system configurations and allocating communication bandwidth to all nodes in real time. User nodes use the allocated bandwidth resources to exchange information.

[0017] The Autbus is a two-wire bus, also known as a field broadband bus or a two-wire industrial control bus. The control node in the Autbus system is configured to generate resource scheduling information and send it to at least one slave node. The resource scheduling information is used to specify the fixed time slots used by each node. In a two-wire network, the smallest time unit is a time slot. 64 time slots make up a frame, and 256 frames make up a superframe. The protocol used is a response connection (half-duplex) on a communication line, that is, the signal on a communication line is transmitted in two opposite directions.

[0018] The present invention provides a signal conversion device between an Autbus bus and a telephone set, wherein the signal conversion device is connected between the Autbus bus and the telephone set, so that the telephone sets communicate with each other through the Autbus bus in cooperation with the signal conversion device. Figure 1 , Figure 2 shown.

[0019] The signal conversion device is connected to the Autbus bus. The Autbus bus uses twisted pair cables without positive and negative distinction. The telephone is connected to the signal conversion device. The signal conversion device receives the telephone signal (dial, voice, on-hook) from the telephone, obtains the encapsulated Autbus message after processing, and caches it. When the Autbus bus resources are obtained, the Autbus message is sent to the Autbus bus. Figure 2 shown.

[0020] The Autbus message includes a message header, a message sequence number, and a message length; the message header can be used to identify the type of the Autbus message; the message length can be used to identify the length of valid data in the Autbus message; and the message sequence number can be used to check the continuity of the Autbus message.

[0021] The types of Autbus messages are Autbus dialing message, Autbus voice message, and Autbus on-hook message, which correspond to the dialing signal, voice simulation signal, and on-hook signal in the telephone signal.

[0022] Specifically, when the signal conversion device encapsulates the Autbus message, it unpacks and encapsulates the Autbus message based on the maximum data that a single time slot of the Autbus bus can carry. For example, the length of the Autbus message is 510 bytes. Since a single time slot of the Autbus bus can send 128 bytes of valid data content, the Autbus message must be split into four packets, three of which are 128 bytes and one is 126 bytes. And set message sequence numbers (0, 1, 2, 3) for these four Autbus messages to ensure the continuity of the unpacked and encapsulated Autbus messages. After the Autbus message is unpacked and encapsulated, an end symbol can be set at the end of the Autbus message.

[0023] After encapsulating the Autbus message, the signal conversion device sends the Autbus message to the Autbus bus when obtaining the Autbus bus resources.

[0024] The Autbus bus adopts a time-sharing processing mode. The nodes of the Autbus bus can be configured by software to receive the Autbus messages of the specified time slot. That is, according to the resource configuration table of the Autbus bus, it can be set to receive only the Autbus messages sent by the specified node. The signal conversion device is connected to the telephone, and the controller of the signal conversion device receives the Autbus messages of the specified time slot through the Autbus bus circuit according to the above software configuration.

[0025] The signal conversion device is connected to a telephone, receives the Autbus message of the specified time slot, processes the Autbus message and converts it into a telephone signal, and sends the telephone signal to the telephone. It should be noted that the message of the corresponding time slot can only be read when the node obtains the Autbus bus resource. For example: Node 1 and Node 2 on the Autbus bus send a telephone signal, which is converted and encapsulated into an Autbus message and sent to the Autbus bus by the signal conversion device. Node 3 chooses to receive the telephone signal sent by Node 1 and does not receive the telephone signal from Node 2. Node 4 chooses not to receive the telephone signal from Node 1 and receives the telephone signal from Node 2.

[0026] Specifically, after receiving the Autbus message of the specified time slot on the Autbus bus, the signal conversion device first checks the type, continuity and integrity of the Autbus message based on the message header and message sequence number in the Autbus message, and then, after receiving the terminator, converts the Autbus message into a corresponding telephone signal according to the order of the message sequence number and the type of the message header, and then sends it to the telephone.

[0027] The signal conversion device of the present invention comprises an Autbus bus circuit, a data processing circuit, a dialing analysis circuit, a ringing trigger circuit, a voice analog-to-digital conversion circuit, a voice digital-to-analog conversion circuit, an on-hook circuit, and a telephone interface circuit; the Autbus bus circuit is connected to the Autbus bus; the Autbus bus circuit is connected to the data processing circuit, and the data processing circuit is respectively connected to the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion, the voice digital-to-analog conversion, and the on-hook circuit; the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion circuit, the voice digital-to-analog conversion circuit, and the on-hook circuit are respectively connected to the telephone interface circuit, and the telephone interface circuit is connected to the telephone, such as Figure 3 shown.

[0028] The present invention also discloses a method for a signal conversion device between an Autbus bus and a telephone, the method is used for communication between telephones via the Autbus bus, the telephones are all connected to the Autbus bus via a signal conversion device; wherein the telephone that actively initiates communication is the calling telephone, and the called telephone is the called telephone; the signal conversion device connected to the calling telephone is the first signal conversion device, and the signal conversion device connected to the called telephone is the second signal conversion device.

[0029] The method comprises the following steps: Step S1, dialing: the calling telephone makes a call, the dialing parsing circuit of the first signal conversion device identifies the called number according to the dialing signal of the calling telephone, the called number is temporarily stored in the designated address, and the data processing circuit of the first signal conversion device encapsulates the called number into an Autbus dialing message; Step S2, routing: the first signal conversion device sends the Autbus dial-up message to the Autbus bus, and the Autbus bus searches for the corresponding second signal conversion device according to the Autbus dial-up message; The data processing circuit of the second signal conversion device processes the Autbus dialing message. If it is determined to be a called telephone, the ringing trigger circuit of the second signal conversion device works to trigger the called telephone through the telephone interface circuit of the second signal conversion device. Step S3, establishing a connection: after the called telephone goes off-hook, a connection is established among the calling telephone, the first signal conversion device, the Autbus bus, the second signal conversion device and the called telephone.

[0030] Step S4, transmitting voice data: The process of the calling telephone transmitting the voice analog signal to the called telephone is as follows: the voice analog signal output by the microphone of the calling telephone is encapsulated into an Autbus voice message by the first signal conversion device, and sent to the second signal conversion device via the Autbus bus, and the second signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the called telephone; The process of the called telephone transmitting the voice analog signal to the calling telephone is as follows: the voice analog signal output by the microphone of the called telephone is encapsulated into an Autbus voice message by the second signal conversion device and sent to the first signal conversion device via the Autbus bus; the first signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the calling telephone; Specifically, in step S4, the specific process of the calling telephone transmitting the voice analog signal to the handed-over telephone is as follows: Step S41: The voice analog signal output by the microphone of the calling telephone is converted into voice data by the voice analog-to-digital conversion circuit of the first signal conversion device; Step S42: the data processing circuit of the first signal conversion device organizes the voice data into an Autbus voice message and caches it, and when obtaining the resources of the Autbus bus, sends the Autbus voice message to the Autbus bus; Step S43: the Autbus bus sends the Autbus voice message of the designated time slot to the second signal conversion device; Step S44: the data processing circuit of the second signal conversion device organizes the Autbus voice message into voice data, and sends it to the voice digital-to-analog conversion circuit of the second signal conversion device for data conversion to obtain a voice analog signal suitable for the called telephone to answer; Step S45: The voice analog signal suitable for the called telephone to answer is transmitted to the handset of the called telephone through the telephone interface circuit of the second signal conversion device to be answered.

[0031] The specific process of the called telephone transmitting the voice analog signal to the calling telephone is as follows: The voice analog signal output by the microphone of the called telephone is converted into voice data by the voice analog-to-digital conversion circuit of the second signal conversion device; the data processing circuit of the second signal conversion device organizes the voice data into Autbus voice messages and caches them, and when the resources of the Autbus bus are obtained, the Autbus voice messages are sent to the Autbus bus; the Autbus bus sends the Autbus voice message of the specified time slot to the first signal conversion device; the data processing circuit of the first signal conversion device organizes the Autbus voice message into voice data, and hands it over to the voice digital-to-analog conversion circuit of the first signal conversion device for data conversion to obtain a voice analog signal suitable for the calling telephone to answer; the voice analog signal suitable for the calling telephone to answer is transmitted to the handset of the calling telephone through the telephone interface circuit of the first signal conversion device for answering.

[0032] Step S5, on-hook: When the calling telephone hangs up, the first signal conversion device converts the on-hook signal into an Autbus on-hook message and transfers it to the second signal conversion device via the Autbus bus, and the second signal conversion device regenerates the on-hook signal and transmits it to the called telephone; When the called telephone hangs up, the second signal conversion device converts the hang-up signal into an Autbus hang-up message and transfers it to the first signal conversion device through the Autbus bus. The first signal conversion device regenerates the hang-up signal and transmits it to the calling telephone.

[0033] Specifically, when the calling telephone hangs up, the specific process is as follows: Step S51: After the calling telephone hangs up, the on-hook circuit of the first signal conversion device detects the on-hook signal and generates on-hook data; Step S52: After the on-hook data is processed by the data processing circuit of the first signal conversion device, an Autbus on-hook message is generated, and the Autbus on-hook message is sent to the Autbus bus through the Autbus bus circuit; Step S53: the Autbus bus sends an Autbus on-hook message of a designated time slot to the second signal conversion device; Step S54: the data processing circuit of the second signal conversion device analyzes and processes the Autbus on-hook message to obtain the on-hook data again; Step S55: the on-hook circuit of the second signal conversion device generates an on-hook signal suitable for the called telephone based on the retrieved on-hook data; Step S56: The on-hook signal suitable for the called telephone is transmitted to the called telephone by the telephone interface circuit of the second signal conversion device, the called telephone hangs up, and the communication between the calling telephone and the called telephone ends.

[0034] When the called phone hangs up, the specific process is as follows: After the called telephone hangs up, the hang-up circuit of the second signal conversion device detects the hang-up signal and generates hang-up data; after the hang-up data is processed by the data processing circuit of the second signal conversion device, an Autbus hang-up message is generated, and the Autbus hang-up message is sent to the Autbus bus through the Autbus bus circuit; the Autbus bus sends the Autbus hang-up message of the specified time slot to the first signal conversion device; the data processing circuit of the first signal conversion device parses and processes the Autbus hang-up message to regain the hang-up data; the hang-up circuit of the first signal conversion device generates a hang-up signal suitable for the calling telephone based on the regained hang-up data; the hang-up signal suitable for the calling telephone is transmitted to the calling telephone by the telephone interface circuit of the first signal conversion device, the calling telephone hangs up, and the communication between the calling telephone and the called telephone ends.

[0035] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A signal conversion device between an Autbus bus and a telephone, characterized in that: The signal conversion device is connected between the Autbus and the telephone, so that the telephones communicate with each other through the Autbus in cooperation with the signal conversion device; The signal conversion device receives the telephone signal of the telephone set, processes it to obtain the encapsulated Autbus message, caches the Autbus message, and sends the Autbus message to the Autbus bus when obtaining the Autbus bus resources; The signal conversion device receives the Autbus message of the specified time slot on the Autbus bus, processes the Autbus message and reconverts it into a telephone signal and then sends it to the telephone.

2. The signal conversion device between Autbus and telephone according to claim 1, characterized in that: The Autbus message includes a message header and a message length; the message header can be used to identify the type of the Autbus message; the message length can be used to identify the length of valid data in the Autbus message; The types of the Autbus messages are Autbus dialing messages, Autbus voice messages, and Autbus on-hook messages; the telephone signals include dialing signals, voice simulation signals, and on-hook signals.

3. The signal conversion device between Autbus and telephone according to claim 1, characterized in that: When encapsulating the Autbus message, the signal conversion device unpacks and encapsulates the Autbus message based on the maximum data that can be carried by a single time slot of the Autbus bus; After the Autbus message is unpacked and encapsulated, a terminator is set at the end of the Autbus message.

4. The signal conversion device between Autbus and telephone according to claim 2, characterized in that: The signal conversion device includes an Autbus bus circuit, a data processing circuit, a dialing analysis circuit, a ringing trigger circuit, a voice analog-to-digital conversion circuit, a voice digital-to-analog conversion circuit, an on-hook circuit, and a telephone interface circuit; the Autbus bus circuit is connected to the Autbus bus; the Autbus bus circuit is connected to the data processing circuit, and the data processing circuit is respectively connected to the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion, the voice digital-to-analog conversion, and the on-hook circuit; the dialing analysis circuit, the ringing trigger circuit, the voice analog-to-digital conversion circuit, the voice digital-to-analog conversion circuit, and the on-hook circuit are respectively connected to the telephone interface circuit, and the telephone interface circuit is connected to the telephone.

5. A method for converting a signal between an Autbus bus and a telephone, the method being based on the signal conversion device according to claim 4, characterized in that: The method is used for communication between telephones via the Autbus bus, and the telephones are all connected to the Autbus bus via a signal conversion device; wherein the telephone that actively initiates the communication is the calling telephone, and the called telephone is the called telephone; the signal conversion device connected to the calling telephone is the first signal conversion device, and the signal conversion device connected to the called telephone is the second signal conversion device; The method comprises the following steps: Step S1, dialing: the calling telephone makes a call, the dialing parsing circuit of the first signal conversion device identifies the called number according to the dialing signal of the calling telephone, the called number is temporarily stored in the designated address, and the data processing circuit of the first signal conversion device encapsulates the called number into an Autbus dialing message; Step S2, routing: the first signal conversion device sends the Autbus dial-up message to the Autbus bus, and the Autbus bus searches for the corresponding second signal conversion device according to the Autbus dial-up message; The data processing circuit of the second signal conversion device processes the Autbus dialing message. If it is determined to be a called telephone, the ringing trigger circuit of the second signal conversion device works to trigger the called telephone through the telephone interface circuit of the second signal conversion device. Step S3, establishing a connection: after the called telephone goes off-hook, a connection is established among the calling telephone, the first signal conversion device, the Autbus bus, the second signal conversion device and the called telephone; Step S4, transmitting voice data: The process of the calling telephone transmitting the voice analog signal to the called telephone is as follows: the voice analog signal output by the microphone of the calling telephone is encapsulated into an Autbus voice message by the first signal conversion device, and sent to the second signal conversion device via the Autbus bus, and the second signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the called telephone; The process of the called telephone transmitting the voice analog signal to the calling telephone is as follows: the voice analog signal output by the microphone of the called telephone is encapsulated into an Autbus voice message by the second signal conversion device and sent to the first signal conversion device via the Autbus bus; the first signal conversion device reconverts the Autbus voice message into a voice analog signal and transmits it to the microphone of the calling telephone; Step S5, on-hook: When the calling telephone hangs up, the first signal conversion device converts the on-hook signal into an Autbus on-hook message and transfers it to the second signal conversion device via the Autbus bus, and the second signal conversion device regenerates the on-hook signal and transmits it to the called telephone; When the called telephone hangs up, the second signal conversion device converts the hang-up signal into an Autbus hang-up message and transfers it to the first signal conversion device through the Autbus bus. The first signal conversion device regenerates the hang-up signal and transmits it to the calling telephone.

6. The method of the signal conversion device between Autbus and telephone according to claim 5, characterized in that: In step S4, the specific process of the calling telephone transmitting the voice analog signal to the called telephone is as follows: Step S41: The voice analog signal output by the microphone of the calling telephone is converted into voice data by the voice analog-to-digital conversion circuit of the first signal conversion device; Step S42: the data processing circuit of the first signal conversion device organizes the voice data into an Autbus voice message and caches it, and when obtaining the resources of the Autbus bus, sends the Autbus voice message to the Autbus bus; Step S43: the Autbus bus sends the Autbus voice message of the designated time slot to the second signal conversion device; Step S44: the data processing circuit of the second signal conversion device organizes the Autbus voice message into voice data, and sends it to the voice digital-to-analog conversion circuit of the second signal conversion device for data conversion to obtain a voice analog signal suitable for the called telephone to answer; Step S45: The voice analog signal suitable for the called telephone to answer is transmitted to the handset of the called telephone through the telephone interface circuit of the second signal conversion device.

7. The method of the signal conversion device between Autbus and telephone according to claim 5, characterized in that: In step S5, the specific steps when the calling phone hangs up are as follows: Step S51: After the calling telephone hangs up, the on-hook circuit of the first signal conversion device detects the on-hook signal and generates on-hook data; Step S52: After the on-hook data is processed by the data processing circuit of the first signal conversion device, an Autbus on-hook message is generated, and the Autbus on-hook message is sent to the Autbus bus through the Autbus bus circuit; Step S53: the Autbus bus sends an Autbus on-hook message of a designated time slot to the second signal conversion device; Step S54: the data processing circuit of the second signal conversion device analyzes and processes the Autbus on-hook message to obtain the on-hook data again; Step S55: the on-hook circuit of the second signal conversion device generates an on-hook signal suitable for the called telephone based on the retrieved on-hook data; Step S56: The on-hook signal suitable for the called telephone is transmitted to the called telephone by the telephone interface circuit of the second signal conversion device, the called telephone hangs up, and the communication between the calling telephone and the called telephone ends.

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