Analog telephone automatic inspection system and method

Abstract

The invention provides an analog telephone automatic inspection system and method, the automatic inspection system comprises a stored program control exchange and an analog telephone, the automatic inspection system also comprises a telephone traversal inspection diagnosis device, the telephone traversal inspection diagnosis device is provided with a first telephone line interface and a second telephone line interface which are respectively connected with the analog telephone and the stored program control exchange; a test module and a line selection switch are arranged in the telephone traversal patrol diagnosis equipment, and the line selection switch can be controlled to carry out line conversion, so that the analog telephone is connected with the test module during test and is connected with the stored program control exchange during non-test. By introducing telephone traversal inspection diagnosis equipment and a matched automatic test mechanism, the problems that traditional simulation telephone inspection depends on manpower, the efficiency is low, and the frequency is limited are solved.

Description

Technical Field

[0001] This invention relates to the field of analog telephone technology, and more specifically to an automatic inspection system and method for analog telephones. Background Technology

[0002] Traditional analog telephone inspection work relies heavily on inspectors going to each user's landline terminal to dial and answer calls, making the entire process highly manpower-dependent. The specific workflow is rather cumbersome, typically requiring inspectors to work in two groups: Group 1 waits at a specific called landline (A) to answer calls, while Group 2 goes to the location of each tested user's landline, picks up the phone, dials landline A's number, and then both groups work together to complete several checks, including whether the phone's appearance is normal, whether the handset has abnormal volume, noise, or unclear sound, and whether the microphone is functioning properly. After the test, Group 1 records the results, and Group 2 moves on to the next tested landline.

[0003] This inspection model has significant limitations in practical applications. When there are a large number of landline phones scattered in scenarios such as industrial parks and water conservancy facilities, the inspection task becomes extremely arduous. It not only requires a large amount of manpower, but also suffers from low inspection frequency due to the limitations of this model, which usually only allows for inspections once a quarter. This makes it difficult to meet the needs for efficient and timely monitoring of the reliability of landline phones.

[0004] Therefore, the shortcomings of traditional analog telephone inspection methods in terms of labor costs, inspection efficiency, and frequency make the development of a more efficient and convenient inspection system and method an urgent problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an automatic inspection system and method for analog telephones, thereby overcoming the shortcomings of analog telephone inspection under the existing technology.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The analog telephone automatic inspection system includes a program-controlled exchange and analog telephones, as well as a telephone traversal testing and diagnostic device. The telephone traversal testing and diagnostic device is equipped with a first telephone line interface and a second telephone line interface, which are respectively connected to the analog telephone and the program-controlled exchange. The telephone traversal testing and diagnostic device is equipped with a test module and a line selection switch, which can control the line selection switch to switch lines, so that the analog telephone is connected to the test module during testing and connected to the program-controlled exchange when not testing.

[0007] The aforementioned analog telephones are installed in multiple units.

[0008] At any given time, at most one of the aforementioned analog telephones will have its line selection switch switched to connect to the test module.

[0009] The aforementioned test module includes a power supply module to provide a DC 48V voltage. The test module can control the power supply module to provide a 48V+ pulse voltage signal A and a 48V+ pulse voltage signal B to the analog telephone as signals for the start and end of the analog telephone's off-hook test.

[0010] The aforementioned analog telephone includes a landline and a handset placed on the landline. The handset has a handset receiver and a handset microphone at its two ends. A test microphone and a test speaker are respectively installed on the landline facing the handset receiver and the handset microphone.

[0011] The aforementioned landline phone is equipped with a test status detection module. The test status detection module is used to detect 48V+ pulse voltage signal A and 48V+ pulse voltage signal B and control the analog phone to enter and exit the test mode. In the test mode, the analog phone enters the call activation mode, and the handset and handset microphone participate in the work. The landline has a standard test audio stored in it. In test mode, the test status detection module can call up the standard test audio and play it from the handset or the patrol test speaker. The signals received by the patrol test microphone and the handset microphone can be modulated by the landline (6) and output through the telephone line.

[0012] The above-mentioned test status detection module can determine whether to control the analog telephone (2) to enter and exit the test mode through the following methods: 1. The test module detects whether the current in the telephone circuit is greater than the minimum current value for normal calls. If it is greater, the analog telephone has successfully entered the test mode and is online. If the line current does not change or is less than or equal to the minimum current value for normal calls, the analog telephone is offline, which corresponds to a line fault or analog telephone fault. After entering or exiting the test mode, the test status detection module sends a test identification signal. The test identification signal is sent to the test module via the telephone line. If the test module sends a pulse voltage but does not receive the test identification signal, it indicates that there is a line fault or analog telephone fault. 2. By extracting the frequency characteristics of the received pulse voltage signal and comparing them with the stored frequency characteristics, it is determined whether the test mode has been entered or exited. After the comparison, if the test mode has been entered or exited, the test status detection module sends a test identification signal. The test identification signal is sent to the test module via the telephone line. If the test module sends a pulse voltage but does not receive the test identification signal, it indicates that there is a line fault or a simulated telephone fault. Method 1 and Method 2 can be used individually or in combination.

[0013] The aforementioned test module includes a demodulation module and a standard voice comparison module. The demodulation module can receive signals sent from the analog telephone and demodulate them into voice. The standard voice comparison module can compare the signals from the analog telephone with the built-in standard signals.

[0014] The inspection steps using the above-described analog telephone automated inspection system are as follows: Step 1: The telephone traversal and diagnostic equipment interrupts the link between the target analog telephone and the PBX; the line selection switch corresponding to the target analog telephone is activated, allowing the target analog telephone to access the test module, thus interrupting the link between the target analog telephone and the PBX. Step 2: The test module controls the transmission of a 48V+ pulse voltage signal A to the target analog telephone line; Step 3: The simulated telephone test status detection module determines whether the test mode has been entered. If it has, it sends a test identification signal to the test module. If the test module does not receive the test identification signal, it indicates that there is a line fault or a simulated telephone fault. Step 4: Simulate the telephone entering test mode. The test status detection module calls the standard test audio and plays the audio for the set duration through the handset. The sound is received by the test microphone of the patrol test, modulated by the landline, and converted into an electrical signal. It is transmitted to the other end of the telephone patrol test diagnostic equipment and received by the test module. The electrical signal received by the test module is recorded as audio 1. Step 5: After the test audio is played by the handset and the set time is completed, the test status detection module calls the standard test audio and plays the audio for the set duration through the speaker via the patrol detection. The sound is received by the handset microphone, modulated by the landline, and converted into an electrical signal, which is transmitted to the other end of the telephone patrol detection diagnostic device and received by the test module. The electrical signal received by the test module is recorded as audio 2. Step Six: The standard speech comparison module within the test module compares and analyzes audio 1 and audio 2 with the built-in standard signal; Step 7: At the end of the test, the test module of the telephone traversal test and diagnostic equipment sends a 48V+ specific pulse voltage signal B to the telephone line of the target analog telephone. After receiving the pulse voltage signal B, the test status detection module in the target analog telephone ends the test mode, resumes the on-hook state, and sends a test identification signal to the test module. If the test module does not receive the feedback test identification signal, it indicates that there is a line fault or analog telephone fault. Step 8: The telephone traversal and diagnostic equipment disconnects the connection between the test module and the target analog telephone line, and restores the connection between the target analog telephone and the program-controlled exchange. Step 9: The telephone line traversal testing and diagnostic equipment tests the next analog telephone line until all analog telephone lines have been tested.

[0015] In step six above, the specific comparison results are as follows: 1. If there is no sound signal in audio 1, but there is a test audio signal in audio 2, it indicates that the user line is functioning correctly, and the following possible faults exist: 1.1 Possible Fault 1: The handset of the landline phone is damaged and cannot play sound, while the landline microphone is normal; 1.2 Possible Fault 2: The handset of the landline phone is damaged and cannot play sound, and the landline phone microphone is faulty and cannot receive sound; 1.3 Possible Fault 3: The handset of the landline phone is working properly, but the landline microphone is faulty and cannot receive sound; 2. If there is no sound signal in audio 2, but there is a test audio signal in audio 1, it indicates that the user line is connected, and the following possible faults exist: 2.1 Possible Fault 1: The landline speaker is damaged and cannot play sound, while the handset microphone is normal; 2.2 Possible Fault 2: The landline speaker is damaged and cannot play sound, and the handset microphone is faulty and cannot receive sound; 2.3 Possible Fault 3: The landline speaker is working properly, but the handset microphone is malfunctioning and cannot receive sound; 3. If there is no sound signal from either Audio 1 or Audio 2, but the user's phone enters test mode normally, the following possibilities may exist: 3.1. The user's telephone handset is not connected to the landline telephone or has poor contact; 3.2. The user's telephone handset microphone and handset are both damaged; 4. If there is significant noise, sound distortion, muffled sound, or low decibel level in audio 1, but normal sound in audio 2, it indicates that the user's line is not interfered with, and the following possibilities exist: 4.1. The handset speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 4.2. The landline microphone is in poor condition, receiving sound with noise, obvious sound distortion, unclear sound, or low decibel level; 5. If there is significant noise in audio 2 but no noise in audio 1, it indicates that the user's line is not interfered with, and the following possibilities exist: 5.1. The speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 5.2. The microphone on the landline handset is in poor condition, receiving noise, significant sound distortion, unclear sound, or low decibel level. 6. If both audio 1 and 2 have noticeable noise, the following possibilities exist: 6.1. The user's line is subject to electromagnetic interference or the insulation of the line is damaged in the middle, resulting in interference from the ground atmosphere; 6.2. Both the landline speaker and the microphone on the landline handset are in poor condition; 7. If both audio 1 and 2 are low in decibels and have no obvious noise, the following possibilities exist: 7.1. The speaker on the landline phone is too quiet and the microphone on the handset has poor sound pickup. 7.2 The microphone on the landline phone has poor sound reception, and the earpiece on the landline handset plays low volume.

[0016] The present invention discloses an automatic analog telephone inspection system and method. By introducing telephone traversal inspection and diagnostic equipment and a corresponding automated testing mechanism, it solves the problems of traditional analog telephone inspections, which rely on manual labor, are inefficient, and have limited frequency. Its beneficial effects are as follows: 1. Reduce labor costs: No need for manual group collaboration and on-site operation; the entire inspection process is completed through automated equipment, reducing reliance on inspection personnel. 2. Improve inspection efficiency and frequency: Multiple analog telephones can be automatically tested sequentially, breaking through the time and space limitations of manual inspection and increasing the inspection frequency (e.g., from once per quarter to a higher frequency). 3. Precise fault diagnosis: Through audio comparison and analysis, it can accurately identify the fault types of components such as circuits, earpieces, microphones, and speakers, improving the accuracy of fault location; 4. No disruption to normal communication: The test mode and normal communication mode can be switched via a line selection switch to ensure that the inspection does not interfere with the user's normal telephone use; 5. Adaptable to multiple terminal scenarios: Supports access from multiple analog telephones, suitable for scenarios with dispersed locations and a large number of terminals, such as parks and water conservancy facilities, with strong scalability. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a connection diagram of the automatic inspection system of the present invention; Figure 2 This is a schematic diagram of the connection when a telephone user is working normally in this invention; Figure 3 This is a connection diagram of the telephone 2 access test mode in this invention; Figure 4 This is a connection diagram of the telephone 1 access test mode in this invention; Figure 5 A schematic diagram of the structure of an analog telephone Figure 1 ; Figure 6 A schematic diagram of the structure of an analog telephone Figure 2 ; Figure 7 This is a schematic diagram of the control chip connection for the test module; Figure 8 A connection diagram for the circuit selector switch; Figure 9 This is a schematic diagram of the power supply module within the test module; Figure 10 A schematic diagram illustrating the workflow of telephone-based traversal testing and diagnostic equipment. Figure 11 A flowchart of the testing module's workflow; Figure 12 A flowchart simulating the workflow of a telephone call in test mode; Figure 13 This is a schematic diagram of the system's workflow.

[0018] Among them: 1. Program-controlled exchange; 2. Analog telephone; 3. Telephone traversal and inspection diagnostic equipment; 3. Test module; 31. Line selection switch; 32. First telephone line interface; 4. Second telephone line interface; 5. Landline; 6. Handset; 7. Inspection and testing microphone; 8. Inspection and testing speaker; 9. Hands-free key; 10. Fork spring pressure plate; 11. Handset handset; 12. Handset microphone; 13. Detailed Implementation

[0019] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1-4 As shown, the analog telephone automatic inspection system includes a program-controlled exchange 1 and an analog telephone 2, as well as a telephone traversal testing and diagnostic device 3. The telephone traversal testing and diagnostic device 3 is provided with a first telephone line interface 4 and a second telephone line interface 5, which are respectively connected to the analog telephone 2 and the program-controlled exchange 1. The telephone traversal testing and diagnostic device 3 is provided with a test module 31 and a line selection switch 32, which can control the line selection switch 32 to switch lines, so that the analog telephone 2 is connected to the test module 31 during testing and connected to the program-controlled exchange 1 when not testing.

[0021] The system adds a telephone traversal and diagnostic device to the traditional PBX and analog telephone system. This device connects to the analog telephone and the PBX via first and second telephone line interfaces, respectively. An internal line selection switch controls the analog telephone to switch between "test mode" connected to the test module and "normal mode" connected to the PBX. This enables flexible switching between analog telephone inspection and normal communication, providing the hardware foundation for automated inspection and avoiding interference with normal user calls.

[0022] like Figure 2As shown, multiple analog telephones (2) are provided. The system supports multiple analog telephones accessing the telephone traversal testing and diagnostic equipment, and manages all terminals through a unified testing module. This meets the inspection needs of multi-terminal scenarios such as industrial parks and water conservancy facilities, expanding the system's applicability.

[0023] like Figure 3 and 4 As shown, at most one of the analog telephones 2 can be switched to the test module 31 via the line selection switch 32 at any given time. The line selection switch only switches one analog telephone to the test module at a time, while the other telephones remain connected to the PBX. This avoids line conflicts or signal interference caused by multiple telephones being tested simultaneously, ensuring the stability and accuracy of the testing process.

[0024] The aforementioned test module 31 includes a power supply module to provide a DC 48V voltage. Test module 31 can control the power supply module to provide 48V+ pulse voltage signal A and 48V+ pulse voltage signal B to the analog telephone 2 as signals for the start and end of the off-hook test. Precise start and stop of the test mode is achieved through specific pulse signals, replacing the manual dialing and answering triggering method and improving the degree of automation.

[0025] like Figure 5 and 6 As shown, the analog telephone 2 includes a landline 6 and a handset 7 placed on the landline 6. The handset 7 has a handset earpiece 12 and a handset microphone 13 at its two ends. A test microphone 8 and a test speaker 9 are respectively positioned on the landline 6 opposite the handset earpiece 12 and the handset microphone 13. The analog telephone's landline, corresponding to the handset earpiece and microphone positions, has a test microphone and speaker, which, in conjunction with the handset earpiece and microphone, complete the transmission and reception of test audio. This establishes a complete test signal transmission link, enabling comprehensive testing of the performance of core components such as the handset earpiece, handset microphone, and landline speaker.

[0026] The aforementioned landline 6 is equipped with a test status detection module. The test status detection module is used to detect 48V+ pulse voltage signal A and 48V+ pulse voltage signal B and control the analog telephone 2 to enter the test mode and end the test mode. In the test mode, the analog telephone 2 enters the call activation mode, and the handset 12 and handset microphone 13 participate in the work. The base unit 6 stores a standard test audio. In test mode, the test status detection module can recall the standard test audio and play it from the handset 12 or the test speaker 9. The signals received by the test microphone 8 and handset microphone 13 can be modulated by the base unit 6 and output through the telephone line. The test status detection module in the base unit detects pulse signals A / B to control the switching of test modes. During testing, the stored standard test audio is recalled and played through the handset or base unit speaker. The received signal is modulated and transmitted to the test module. This realizes the automatic generation, playback, and transmission of test signals, providing a data foundation for subsequent audio comparison and analysis, and reducing human judgment errors.

[0027] The aforementioned test status detection module can determine whether to control the analog phone 2 to enter and exit test mode using the following methods: 1. The test module detects whether the current in the telephone circuit is greater than the minimum current value for normal calls. If it is greater, the analog telephone 2 has successfully entered the test mode and is online. If the line current does not change or is less than or equal to the minimum current value for normal calls, the analog telephone 2 is offline, which corresponds to a line fault or a fault in the analog telephone 2. After entering or exiting the test mode, the test status detection module sends a test identification signal. The test identification signal is sent to the test module 31 via the telephone line. If the test module 31 sends a pulse voltage but does not receive the test identification signal, it indicates that a line fault or a fault in the analog telephone 2 has occurred. 2. By extracting the frequency characteristics of the received pulse voltage signal and comparing them with the stored frequency characteristics, it is determined whether the test mode has been entered or ended. After the comparison, if the test mode has been entered or the test mode has been ended, the test status detection module sends a test identification signal. The test identification signal is sent to the test module 31 via the telephone line. If the test module 31 sends a pulse voltage but does not receive the test identification signal, it indicates that there is a line fault or a fault in the analog telephone 2. Method 1 and Method 2 can be used individually or in combination. The test status detection module determines the test mode switch in two ways: ① detecting whether the circuit current is greater than the minimum value for normal communication; ② extracting the frequency characteristics of the pulse voltage signal and comparing it with the stored characteristics. These two methods can be used individually or in combination, and a test identification signal is sent to the test module after the switch.

[0028] The aforementioned test module 31 includes a demodulation module and a standard voice comparison module. The demodulation module receives the signal transmitted from analog telephone 2 and demodulates it into voice. The standard voice comparison module compares the signal from analog telephone 2 with a built-in standard signal. This dual judgment mechanism improves the accuracy of test mode switching and ensures that the test module can promptly identify line or equipment faults through indicator signal feedback, thus enhancing the reliability of fault detection. The demodulation module demodulates the signal transmitted from the analog telephone into voice, and the standard voice comparison module compares the demodulated audio with the built-in standard signal. This achieves automated analysis of the test signal, providing quantitative basis for fault type judgment and replacing manual subjective judgment (such as volume, noise, etc.).

[0029] like Figure 10-13 As shown in the figure, the inspection method using the above-mentioned analog telephone automatic inspection system includes the following steps: Step 1: The telephone traversal and diagnostic equipment 3 interrupts the link between the target analog telephone 2 and the program-controlled exchange 1; the line selection switch 32 corresponding to the target analog telephone 2 is activated, so that the target analog telephone 2 is connected to the test module 31, and the link between the target analog telephone 2 and the program-controlled exchange 1 is interrupted. Step 2: Test module 31 controls the transmission of a 48V+ pulse voltage signal A to the target analog telephone 2 telephone line; Step 3: The test status detection module inside the analog telephone 2 determines whether it has entered the test mode. If it has, it sends a test identification signal to the test module 31. If the test module 31 does not receive the feedback test identification signal, it indicates that there is a line fault or a fault in the analog telephone 2. Step 4: Simulated telephone 2 enters test mode. The test status detection module calls the standard test audio and plays the audio for the set duration through the handset 12. The sound is received by the patrol detection test microphone 8, modulated by the landline 6, and then converted into an electrical signal and transmitted to the other end of the telephone patrol detection diagnostic device 3 and received by the test module 31. The electrical signal received by the test module is recorded as audio 1. Step 5: After the test audio is played by the handset 12 and the set time is completed, the test status detection module calls the standard test audio and plays the audio for the set duration through the traversal detection test speaker 9. The sound is received by the handset microphone 13, modulated by the landline 6, and converted into an electrical signal. The signal is transmitted to the telephone traversal detection diagnostic device 3 at the other end and received by the test module 31. The electrical signal received by the test module is recorded as audio 2. Step 6: The standard speech comparison module in test module 31 compares and analyzes audio 1 and audio 2 with the built-in standard signal; Step 7: At the end of the test, the test module 31 of the telephone traversal test and diagnostic device 3 sends a 48V+ specific pulse voltage signal B to the telephone line of the target analog telephone 2. After receiving the pulse voltage signal B, the test status detection module in the target analog telephone 2 ends the test mode, resumes the on-hook state, and sends a test identification signal to the test module 31. If the test module 31 does not receive the feedback test identification signal, it indicates that there is a line fault or a fault in the analog telephone 2. Step 8: The telephone traversal and diagnostic equipment 3 disconnects the connection between the test module 31 and the target analog telephone 2 line, and restores the connection between the target analog telephone 2 and the program-controlled exchange 1. Step 9: The telephone traversal testing and diagnostic equipment 3 tests the next analog telephone line 2 until all analog telephone lines 2 have been tested.

[0030] A fully automated inspection mechanism has been established, which can complete the testing of all terminals without manual intervention, greatly improving inspection efficiency.

[0031] In step six above, the specific comparison results are as follows: 1. If there is no sound signal in audio 1, but there is a test audio signal in audio 2, it indicates that the user line is functioning correctly, and the following possible faults exist: 1.1 Possible Fault 1: The handset of the landline phone is damaged and cannot play sound, while the landline microphone is normal; 1.2 Possible Fault 2: The handset of the landline phone is damaged and cannot play sound, and the landline phone microphone is faulty and cannot receive sound; 1.3 Possible Fault 3: The handset of the landline phone is working properly, but the landline microphone is faulty and cannot receive sound; 2. If there is no sound signal in audio 2, but there is a test audio signal in audio 1, it indicates that the user line is connected, and the following possible faults exist: 2.1 Possible Fault 1: The landline speaker is damaged and cannot play sound, while the handset microphone is normal; 2.2 Possible Fault 2: The landline speaker is damaged and cannot play sound, and the handset microphone is faulty and cannot receive sound; 2.3 Possible Fault 3: The landline speaker is working properly, but the handset microphone is malfunctioning and cannot receive sound; 3. If there is no sound signal from either Audio 1 or Audio 2, but the user's phone enters test mode normally, the following possibilities may exist: 3.1. The user's telephone handset is not connected to the landline telephone or has poor contact; 3.2. The user's telephone handset microphone and handset are both damaged; 4. If there is significant noise, sound distortion, muffled sound, or low decibel level in audio 1, but normal sound in audio 2, it indicates that the user's line is not interfered with, and the following possibilities exist: 4.1. The handset speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 4.2. The landline microphone is in poor condition, receiving sound with noise, obvious sound distortion, unclear sound, or low decibel level; 5. If there is significant noise in audio 2 but no noise in audio 1, it indicates that the user's line is not interfered with, and the following possibilities exist: 5.1. The speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 5.2. The microphone on the landline handset is in poor condition, receiving noise, significant sound distortion, unclear sound, or low decibel level. 6. If both audio 1 and 2 have noticeable noise, the following possibilities exist: 6.1. The user's line is subject to electromagnetic interference or the insulation of the line is damaged in the middle, resulting in interference from the ground atmosphere; 6.2. Both the landline speaker and the microphone on the landline handset are in poor condition; 7. If both audio 1 and 2 are low in decibels and have no obvious noise, the following possibilities exist: 7.1. The speaker on the landline phone is too quiet and the microphone on the handset has poor sound pickup. 7.2 The microphone on the landline phone has poor sound reception, and the earpiece on the landline handset plays low volume.

[0032] By comparing the sound signals, noise, decibels, and other characteristics of Audio 1 (played by the handset and received by the landline microphone) and Audio 2 (played by the landline speaker and received by the handset microphone), preset fault types (such as handset damage, line interference, etc.) are matched. This achieves accurate fault classification and location, quickly identifies component faults or line problems, provides clear guidance for repair, and reduces troubleshooting time.

Claims

1. An automatic inspection system for analog telephones, comprising a program-controlled exchange (1) and an analog telephone (2), characterized in that, It also includes a telephone traversal testing and diagnostic device (3). The telephone traversal testing and diagnostic device (3) is provided with a first telephone line interface (4) and a second telephone line interface (5) which are respectively connected to the analog telephone (2) and the program-controlled exchange (1). The telephone traversal testing and diagnostic device (3) is provided with a test module (31) and a line selection switch (32). The line selection switch (32) can be controlled to switch lines, so that the analog telephone (2) is connected to the test module (31) during testing and to the program-controlled exchange (1) during non-testing.

2. The analog telephone automatic inspection system according to claim 1, characterized in that, The analog telephone (2) is equipped with multiple units.

3. The analog telephone automatic inspection system according to claim 2, characterized in that, At any given time, at most one of the analog telephones (2) has its line selection switch (32) switched to connect to the test module (31).

4. The analog telephone automatic inspection system according to claim 3, characterized in that, The test module (31) is equipped with a power supply module to provide DC 48V voltage. The test module (31) can control the power supply module to provide 48V+ pulse voltage signal A and 48V+ pulse voltage signal B to the analog telephone (2) as signals for the start and end of the analog telephone (2) to enter the off-hook test.

5. The analog telephone automatic inspection system according to claim 4, characterized in that, The analog telephone (2) includes a landline (6) and a handle (7) placed on the landline (6). The two ends of the handle (7) are a handle handset (12) and a handle microphone (13). A patrol test microphone (8) and a patrol test speaker (9) are respectively provided on the landline (6) facing the handle handset (12) and the handle microphone (13).

6. The analog telephone automatic inspection system according to claim 5, characterized in that, The landline (6) is equipped with a test status detection module. The test status detection module is used to detect 48V+ pulse voltage signal A and 48V+ pulse voltage signal B and control the analog telephone (2) to enter the test mode and end the test mode. In the test mode, the analog telephone (2) enters the call activation mode, and the handset earpiece (12) and handset microphone (13) participate in the work. The base unit (6) stores a standard test audio. In test mode, the test status detection module can call up the standard test audio and play it from the handset (12) or the patrol test speaker (9). The signals received by the patrol test microphone (8) and the handset microphone (13) can be modulated by the base unit (6) and output through the telephone line.

7. The analog telephone automatic inspection system according to claim 6, characterized in that, The test status detection module can determine whether to control the analog telephone (2) to enter and exit the test mode using the following methods:

1. Check whether the telephone circuit current is greater than the minimum current value for normal calls; if it is greater, the analog telephone (2) has successfully entered the test mode and the telephone is online; if the line current does not change or is less than or equal to the minimum current value for normal calls, the analog telephone (2) is offline, that is, the line fault of the analog telephone (2) or the analog telephone (2) is faulty. After entering or ending the test mode, the test status detection module sends a test identification signal. The test identification signal is sent to the test module (31) via the telephone line. If the test module (31) sends a pulse voltage but does not receive the test identification signal, it indicates that there is a line fault or the analog telephone (2) is faulty.

2. By extracting the frequency characteristics of the received pulse voltage signal and comparing them with the stored frequency characteristics, it is determined whether the test mode has been entered or ended. After the comparison is completed, if the test mode has been entered or the test mode has been entered, the test status detection module sends a test identification signal. The test identification signal is sent to the test module (31) via the telephone line. If the test module (31) sends a pulse voltage but does not receive the test identification signal, it indicates that there is a line fault or a fault in the analog telephone (2). Method 1 and Method 2 can be used individually or in combination.

8. The analog telephone automatic inspection system according to claim 7, characterized in that, The test module (31) includes a demodulation module and a standard voice comparison module. The demodulation module can receive the signal sent from the analog telephone (2) and demodulate it into voice. The standard voice comparison module can compare the signal from the analog telephone (2) with the built-in standard signal.

9. The inspection method using the analog telephone automatic inspection system as described in claim 8, characterized in that, The inspection steps are as follows: Step 1: The telephone traversal test and diagnostic equipment (3) interrupts the link between the target analog telephone (2) and the program-controlled exchange (1); the line selection switch (32) corresponding to the target analog telephone (2) is activated, so that the target analog telephone (2) is connected to the test module (31), interrupting the link between the target analog telephone (2) and the program-controlled exchange (1); Step 2: The test module (31) controls the transmission of a 48V+ pulse voltage signal A to the target analog telephone (2) telephone line; Step 3: The test status detection module inside the analog telephone (2) determines whether it has entered the test mode. If it has, it sends a test identification signal to the test module (31). If the test module (31) does not receive the feedback test identification signal, it indicates that there is a line fault or a fault in the analog telephone (2). Step 4: The simulated telephone (2) enters the test mode. The test status detection module calls the standard test audio and plays the audio for the set duration through the handset (12). The sound is received by the patrol test microphone (8), modulated by the landline (6), and then converted into an electrical signal and transmitted to the telephone traversal patrol test diagnostic device (3) at the other end and received by the test module (31). The electrical signal received by the test module is recorded as audio 1. Step 5: After the test audio is played by the handset (12) and the set time is completed, the test status detection module calls the standard test audio and plays the audio for the set duration through the speaker (9) of the traversal detection test. The sound is received by the handset microphone (13), modulated by the landline (6), and then converted into an electrical signal and transmitted to the telephone traversal detection diagnostic device (3) at the other end and received by the test module (31). The electrical signal received by the test module is recorded as audio 2. Step 6: The standard speech comparison module in the test module (31) compares and analyzes audio 1 and audio 2 with the built-in standard signal; Step 7: At the end of the test, the test module (31) of the telephone traversal test and diagnostic equipment (3) sends a 48V+ specific pulse voltage signal B to the telephone line of the target analog telephone (2). After receiving the pulse voltage signal B, the test status detection module inside the target analog telephone (2) ends the test mode, restores the on-hook state, and sends a test identification signal to the test module (31). If the test module (31) does not receive the feedback test identification signal, it indicates that there is a line fault or a fault in the analog telephone (2). Step 8: Telephone traversal and diagnostic equipment (3) disconnects the connection between the test module (31) and the target analog telephone (2) and restores the connection between the target analog telephone (2) and the program-controlled exchange (1); Step 9: The telephone traversal testing and diagnostic equipment (3) tests the next analog telephone (2) line until all analog telephone (2) lines have been tested.

10. The inspection method of the analog telephone automatic inspection system according to claim 9, characterized in that, In step six, the specific comparison results are as follows: 1) If there is no sound signal in audio 1, but there is a test audio signal in audio 2, it indicates that the user line is connected, and the following possible faults exist: 1.1 Possible Fault 1: The handset of the landline phone is damaged and cannot play sound, while the landline microphone is normal; 1.2 Possible Fault 2: The handset of the landline phone is damaged and cannot play sound, and the landline phone microphone is faulty and cannot receive sound; 1.3 Possible Fault 3: The handset of the landline phone is working properly, but the landline microphone is faulty and cannot receive sound; 2) If there is no sound signal in audio 2, but there is a test audio signal in audio 1, it indicates that the user line is connected, and the following possible faults exist: 2.1 Possible Fault 1: The landline speaker is damaged and cannot play sound, while the handset microphone is normal; 2.2 Possible Fault 2: The landline speaker is damaged and cannot play sound, and the handset microphone is faulty and cannot receive sound; 2.3 Possible Fault 3: The landline speaker is working properly, but the handset microphone is malfunctioning and cannot receive sound; 3) If there is no sound signal from either Audio 1 or Audio 2, but the user's phone enters test mode normally, the following possibilities may exist: 3.

1. The user's telephone handset is not connected to the landline telephone or has poor contact; 3.

2. The user's telephone handset microphone and handset are both damaged; 4) If there is significant noise, sound distortion, muffled sound, or low decibel level in audio 1, but normal sound in audio 2, it indicates that the user's line is not interfered with, and the following possibilities exist: 4.

1. The handset speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 4.

2. The landline microphone is in poor condition, receiving sound with noise, obvious sound distortion, unclear sound, or low decibel level; 5) If there is significant noise in audio 2 but no noise in audio 1, it indicates that the user's line is not interfered with, and the following possibilities exist: 5.

1. The speaker on the landline phone is in poor condition, producing noisy, distorted, muffled, or low-decibel sound. 5.

2. The microphone on the landline handset is in poor condition, receiving noise, significant sound distortion, unclear sound, or low decibel level. 6) If both audio 1 and 2 have noticeable noise, the following possibilities exist: 6.

1. The user's line is subject to electromagnetic interference or the insulation of the line is damaged in the middle, resulting in interference from the ground atmosphere; 6.

2. Both the landline speaker and the microphone on the landline handset are in poor condition; 7) If both audio 1 and 2 are low in decibels and have no obvious noise, the following possibilities exist: 7.

1. The speaker on the landline phone is too quiet and the microphone on the handset has poor sound pickup. 7.2 The microphone on the landline phone has poor sound reception, and the earpiece on the landline handset plays low volume.

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