A terminal login host station reliability automatic testing method and device

Abstract

This invention belongs to the field of power equipment performance testing technology, specifically relating to an automatic testing method and device for terminal login reliability to a master station. It involves designing test modules for various operators and developing host computer software. After removing the network communication module and SIM card from the terminal under test, it connects to each operator's test module. The host computer sets public network parameters and controls the switching of the corresponding operator's test module according to the operator network switching sequence of the terminal under test. After switching to each operator's test module, if the corresponding SIM card operator is correct, the terminal's login status to the master station is monitored. If login is successful, the next operator's test module is switched; otherwise, the login status is checked again after a first set time. This process is repeated until the reliability test task of terminal switching operator networks to log in to the master station is completed, thus achieving automated testing of terminal login reliability to the master station.

Description

Technical Field

[0001] This invention belongs to the field of power equipment performance testing technology, specifically relating to an automatic testing method and device for terminal login master station reliability. Background Technology

[0002] With the comprehensive construction of electricity information collection systems, the collection terminals are equipped with operator communication modules and SIM cards, used to log in (i.e., connect) to the main station through the operator's network, and upload important information such as user load, electricity consumption, and voltage from the metering devices to the main station in real time. For example, Gu Gao et al. proposed "Research and Application of SIM Card Communication Testing Equipment." The electricity information collection system adopts GPRS packet switching communication technology of public SIM cards. By fixing the IP address of each communication number, a "virtual private network" is established to achieve long-distance, efficient, reliable, secure, and low-cost communication. To ensure the reliability of the collection terminals, before reusing recycled old SIM cards, the recycled SIM cards are inserted into the test module. The test host connects to the enterprise server via the network and reads the SIM information through the internal communication module to test the SIM cards. The test system software framework is as follows: Figure 1 As shown.

[0003] Most terminals within the national network use the networks of the three major telecom operators. When a terminal logs into the main site using a different operator's network, it needs to use a SIM card from that operator. If the terminal cannot connect to the main site after switching operators, the offline status of the terminal will affect the uploading of electricity consumption data, resulting in missing electricity consumption information. Therefore, it is necessary to test the reliability of the terminal's login to the main site, that is, to test the terminal's stable online capability. Currently, when conducting reliability tests on the terminal's login to the main site by switching between different operator networks, it is necessary to manually change the SIM card of different operators. Each time, the SIM card must be manually removed and replaced with a SIM card from another operator to switch operator networks. During the test, the SIM card needs to be frequently switched to verify the terminal's ability to adaptively switch networks to log into the main site. This method requires testers to change SIM cards regularly, which is inefficient. To improve efficiency in long-term testing, the only way is to add more terminals and SIM cards, which is costly and wastes resources. Moreover, there is a certain time error in manually changing SIM cards, and the timing of SIM card changes cannot be accurate, leading to inaccurate test results and significant deviations in long-term testing. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic testing method and apparatus for terminal login main station reliability, in order to solve the problems of low testing efficiency and inaccurate test results when testing the reliability of terminal login main station by manually replacing SIM cards.

[0005] To address the aforementioned technical problems, this invention provides an automatic reliability testing method for terminal login to a master station. The method includes a reliability test for terminal switching operator networks to log in to the master station. The reliability test comprises: removing the network communication module and SIM card from the terminal under test and connecting it to various operator test modules, each operator test module including a network communication module and a corresponding operator SIM card; setting public network parameters via a host computer and controlling the switching of the corresponding operator test module according to the operator network switching order of the terminal under test; after switching to each operator test module, if the corresponding SIM card operator is correct, monitoring the terminal's login status to the master station; if login is successful, switching to the next operator test module; otherwise, waiting for a first set time and then re-checking the login status; and repeating the test until the reliability test task for terminal switching operator networks to log in to the master station is completed.

[0006] Furthermore, if login still fails after the first set delay time, the terminal and carrier test module are powered down and reset, and the test is restarted. If the number of consecutive login failures exceeds the set number, the carrier test module is skipped, and only the reliability test of terminal switching carrier network login to the main station under other carrier test modules is performed.

[0007] Furthermore, the test also includes a reliability test of the terminal logging into the main station after the module is powered off and reset. This includes: removing the network communication module and SIM card from the terminal under test and connecting the corresponding operator test module; setting public network parameters through the host computer and controlling the power-on of the corresponding operator test module; after confirming that the corresponding SIM card operator is correct, monitoring the terminal's login status to the main station; if the login is successful, controlling the power-off of the corresponding operator test module; after a second set time delay, controlling the power-on of the corresponding operator test module; repeating this process until the reliability test of the terminal logging into the main station after the module is powered off and reset is completed; if the login fails, waiting for a first set time and then checking again; if the number of consecutive login failures exceeds the set number, the test ends.

[0008] Furthermore, the method for controlling the switching of the corresponding operator test module is to power on the operator test module and power off the other operator test modules. The powering on and powering off of the operator test modules are both achieved by controlling the switches set on the power supply lines of each operator test module through the host computer.

[0009] Furthermore, the host computer is also used to count and display the number of successful and failed login attempts of terminals under each operator's network to the main station.

[0010] The beneficial effects of the above technical solution are as follows: This invention is an improved invention, which designs multiple operator test modules. Each operator test module corresponds to a network communication module and an operator SIM card. After the network communication module and SIM card are removed from the terminal under test, the corresponding operator test module is selected based on the operator network connection used by the terminal under test. Host computer software is developed, which controls the switching of operator test modules according to the operator network switching order. After the SIM card is correctly switched, the corresponding login status is monitored, enabling the terminal to automatically switch between different operator networks to log in to the main station. This allows for 24-hour uninterrupted cyclic testing without the need for manual SIM card replacement, resulting in more accurate test results. This achieves automated testing of the reliability of terminal switching operator networks to log in to the main station, effectively reducing testing time and improving testing efficiency.

[0011] To address the aforementioned technical problems, this invention also provides an automatic testing device for terminal login reliability to a main station, comprising a host computer and various operator testing modules. Each operator testing module includes a network communication module and a corresponding operator SIM card. The host computer is used to set public network parameters. During the reliability test of terminal switching operator networks to log in to the main station, it controls the switching of the corresponding operator testing module according to the operator network switching order of the terminal under test. After switching to each operator testing module, after verifying that the corresponding SIM card operator is correct, it monitors the terminal's login status to the main station. If login fails, it delays for a first set time and then re-verifies the login status. If login succeeds, it switches to the next operator testing module; otherwise, it waits for the first set time and then re-verifies the login status. This process is repeated until the reliability test task of terminal switching operator networks to log in to the main station is completed.

[0012] Furthermore, the host computer is also used to power-down reset the terminal and the operator test module when the terminal still fails to log in after a first set time delay, and then listen to the terminal's login status to the main station again after determining that the corresponding SIM card operator is correct. If the number of consecutive login failures of the terminal exceeds a set number, the host computer will skip the operator test module and control the switching to other operator test modules.

[0013] Furthermore, each operator test module has a corresponding switch on its power supply line. The host computer is also used to set public network parameters and control the corresponding operator test module to power on during the reliability test of the terminal logging into the main station after the module is powered off and reset. After determining that the corresponding SIM card operator is correct, the host computer monitors the terminal's login status to the main station. If the login is successful, the host computer controls the corresponding operator test module to power off and then controls the corresponding operator test module to power on after a second set time delay. This process is repeated until the reliability test of the terminal logging into the main station after the module is powered off and reset is completed.

[0014] Furthermore, the host computer switches between corresponding operator test modules by controlling the power-on of the corresponding operator test module and the power-off of other operator test modules through a switch.

[0015] Furthermore, the host computer is also used to count and display the number of times terminals successfully and unsuccessfully log in to the main station under each operator's network.

[0016] The beneficial effects of the above technical solution are as follows: This invention is an improved invention, designing an automated testing device including multiple operator testing modules and a host computer. Each operator testing module corresponds to a network communication module and an operator SIM card. After the network communication module and SIM card are removed from the terminal under test, the corresponding operator testing module is selected based on the operator network connection used by the terminal under test. The host computer controls the switching of operator testing modules according to the operator network switching order. After the correct SIM card is switched, the corresponding login status is monitored, enabling the terminal to automatically switch between different operator networks to log in to the main station. This allows for 24-hour uninterrupted cyclic testing without the need for manual SIM card replacement, resulting in more accurate test results. This achieves automated testing of the reliability of terminal switching operator networks to log in to the main station, effectively reducing testing time and improving testing efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the software framework of a SIM card communication detection device in the prior art; Figure 2 This is a schematic diagram of the automatic terminal login main station reliability testing device of the present invention; Figure 3 This is a flowchart of the power-on / off switching control of the operator test module of the present invention; Figure 4 This is an overall flowchart of the automatic reliability test of the terminal login main station according to the present invention; Figure 5 This is a flowchart of the reliability test for terminal switching operator network login to the main station according to the present invention; Figure 6 This is a flowchart of the reliability test process for the terminal logging into the main station after the module of the present invention is powered off and reset. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] This invention designs multiple operator testing modules for accessing operator networks and develops host computer software to automate the testing of terminals switching between multiple operator networks to log in to the main station.

[0020] Device Implementation An automatic testing device for terminal login main station reliability according to the present invention, such as Figure 2 As shown, it includes the host computer and test modules for various operators.

[0021] The operator testing module includes a network communication module and corresponding operator SIM cards. The network communication module covers all operators supported by the terminal, such as 2G / 3G, 4G, 5G, and NB modules. The SIM cards include those from China Mobile, China Unicom, and China Telecom. Correspondingly, the operator testing module includes a mobile operator module for accessing the mobile network, a China Unicom module for accessing the China Unicom network, and a China Telecom module for accessing the China Telecom network. For example, using three GPRS full-network compatible modules and inserting SIM cards from three different operators allows for multi-operator cyclic testing.

[0022] The host computer runs corresponding host computer software, which has information comparison and statistics unit, SIM card management and SIM card testing functions. The SIM card testing function includes: acquiring SIM card information (such as ICCID), connecting to the public network, controlling the switching of the corresponding operator test module according to the operator network switching order of the terminal under test, and monitoring the terminal's login status to the main station (i.e., the terminal's network status). In one embodiment, this device also includes a switch switching circuit, composed of switches corresponding to each power supply line; the switches can be relays. Figure 3 As shown, by sending control commands to the switch via the host computer, the power on / off switching of different operator test modules can be achieved, thereby controlling the power on / off of the corresponding operator test module through the switch. The information comparison and statistics function includes: determining the operator based on SIM card information, and statistically analyzing the number of successful and failed login attempts of the terminal to the main station under each operator's network. The SIM card management function includes: public network parameter configuration and SIM card status changes; public network parameters include the main station IP and port number in the communication network, and SIM card status refers to the current operator to which the SIM card belongs.

[0023] The host computer is also used to display the statistical count of login failures and successes. It also saves process logs during the login process, allowing for quick analysis and location of issues such as login failures and abnormal logins.

[0024] Based on the above settings, an automatic reliability testing method for terminal login to the main station is implemented, including reliability testing of terminal login to the main station when switching operator networks. The overall process is as follows: Figure 5 As shown, it includes: 1. After removing the network communication module and SIM card from the terminal under test, connect the test modules of each operator, power on the terminal, and switch the corresponding operator test module according to the operator network switching order of the terminal under test.

[0025] 2. Perform SIM card detection to determine if the SIM card is present. If it is not present, perform a SIM card missing error. If it is present, determine if the corresponding SIM card operator is correct.

[0026] 3. After the SIM card operator is contacted, monitor the terminal's login status on the main site and save the login result.

[0027] The above-described process control switching operator test module automatically performs reliability tests on terminal login to the main station via operator network switching. The loop terminates when the number of tests reaches the expected number of tests for the test task.

[0028] Specifically, the reliability testing process for terminals switching carrier networks to log in to the main site is as follows: Figure 4 As shown, it includes: S1: Connect the terminal to the corresponding operator test module.

[0029] After removing the network communication module and SIM card from the terminal under test, connect it to the test modules of various operators. For example, the terminal can be connected to the modules of China Mobile, China Unicom, and China Telecom simultaneously.

[0030] S2: Configure public network parameters via the host computer and control the switching of the corresponding operator test module according to the operator network switching order of the terminal under test.

[0031] For example, based on the network switching sequence of the terminal under test, a switch can be used to power on the corresponding carrier's test module while de-energizing other carrier's test modules, thus switching to the corresponding carrier's test module. Alternatively, the switching of the corresponding carrier's test module can be controlled by disconnecting or connecting the data transmission and reception channels of the carrier's test module.

[0032] S3: Determine if the carrier is correct.

[0033] After switching to the carrier test module, obtain the ICCID of the SIM card corresponding to the module and compare whether the ICCID belongs to the corresponding carrier. If it belongs, proceed to the next step; otherwise, perform hardware initialization, i.e., power-down reset of the terminal and carrier test module. After a second set time delay (the second set time is determined based on the power-down reset duration of the terminal and carrier test module, such as 60 seconds), obtain the ICCID of the SIM card corresponding to the carrier test module again after power-on for judgment. If the carrier still fails after the first set number of consecutive attempts (such as 3 times), skip the carrier test module and only perform reliability tests on terminal switching carrier network login to the main station under other carrier test modules.

[0034] S4: Monitor the terminal's login status to the main station.

[0035] Open the listening port to monitor the terminal's network status. After switching to the corresponding operator's test module, the terminal negotiates network login with the main station through that operator's network, for example, by initiating PPP dialing. If the PPP dialing is successful, the terminal successfully logs into the main station; if the PPP dialing fails, the terminal fails to log into the main station. The host computer reads and saves the login result. If the login is successful, switch to the next operator's test module; otherwise, wait for a set time (e.g., 10 minutes) and check again. If the number of consecutive login failures exceeds the set number (e.g., 3 times), skip that operator's test module and only perform reliability tests on the terminal's switching operator network to log into the main station under other operator's test modules.

[0036] The above process is repeated until the reliability test task of switching carrier networks to log in to the main station is completed, for example, when the total number of cycles reaches the expected number of tests. The switching and monitoring are controlled by the host computer software, cyclically switching between different carrier networks to automatically verify the reliability of the terminal's online operation.

[0037] This device is also used to perform reliability testing on the terminal's login to the main station after the module has been powered off and reset, such as... Figure 6 As shown, it includes the following steps: 1) After removing the network communication module and SIM card from the terminal under test, test the corresponding operator test module according to the operator network used by the terminal under test.

[0038] 2) Configure public network parameters via the host computer to control the power-on of the corresponding operator test module.

[0039] For example, when it is necessary to test the reliability of the terminal re-identifying the operator and logging into the main station after the module corresponding to the mobile operator is powered off and reset, the power on of the mobile operator module is controlled.

[0040] 3) After the host computer determines that the corresponding SIM card operator is correct, it monitors the terminal's login status to the main station.

[0041] Open the listening port to monitor the terminal's network status. After the operator test module is powered on, the terminal negotiates network login with the main station through the operator's network, for example, by initiating PPP dialing. If the PPP dialing is successful, the terminal successfully logs into the main station; if the PPP dialing fails, the terminal fails to log into the main station. The host computer reads and saves the login result. If the login is successful, the corresponding operator test module is powered off. After a second set time delay, the corresponding operator test module is powered on again. The test is repeated until the reliability test task of the terminal logging into the main station after the module is powered off and reset is completed (i.e., the number of tests is greater than the expected number of tests). If the login fails, wait for a first set time (e.g., 10 minutes) and then check again. If the number of consecutive login failures is greater than the set number (e.g., 3 times), the loop is terminated and the test ends.

[0042] The testing procedures of other operators (such as China Unicom and China Telecom) are similar to Figure 5 The expected number of tests is consistent and determined based on the specific test item type. Simply check the number of successful logins on the host computer at the end of the test to verify whether frequent power outages and restorations of the module affect the login to the main site.

[0043] Method Implementation This invention discloses an automatic testing method for terminal login master station reliability, which is implemented based on an automatic testing device for terminal login master station reliability. The automatic testing device for terminal login master station reliability includes a host computer and testing modules for various operators.

[0044] The operator testing module includes a network communication module and a corresponding operator SIM card, used to connect the network communication module to the terminal after the SIM card is removed. The network communication module covers the operators supported by the terminal, including 2G / 3G, 4G, 5G, and NB modules, etc. The SIM card includes mobile operator SIM cards, China Unicom operator SIM cards, and China Telecom operator SIM cards. Correspondingly, the operator testing module includes a mobile operator module for accessing the mobile network, a China Unicom operator module for accessing the China Unicom network, and a China Telecom operator module for accessing the China Telecom network. For example, using three GPRS full-network compatible modules and inserting three SIM cards from three different operators, multi-operator cyclic testing can be achieved.

[0045] The host computer runs corresponding host computer software, which has information comparison and statistics unit, SIM card management and SIM card testing functions. The SIM card testing function includes: acquiring SIM card information (such as ICCID), connecting to the public network, controlling the switching of the corresponding operator test module according to the operator network switching order of the terminal under test, and monitoring the terminal's login status to the master station (i.e., the terminal network status). In one embodiment, the device also includes a switch switching circuit, composed of switches corresponding to each power supply line. The switches can be relays. The host computer sends control commands to the switches to switch the power on and off of different operator test modules, thereby controlling the power on and off of the corresponding operator test module through the switches. The information comparison and statistics function includes: judging the operator based on the SIM card information, and counting the number of times the terminal successfully and unsuccessfully logs into the master station under each operator's network. The SIM card management function includes: public network parameter configuration and SIM card status change; public network parameters include the master station IP and port number in the communication network, and SIM card status refers to the current operator to which the SIM card belongs.

[0046] The host computer is also used to display the statistical count of login failures and successes. It also saves process logs during the login process, allowing for quick analysis and location of issues such as login failures and abnormal logins.

[0047] The automatic reliability testing method for terminal login to the master station of the present invention includes reliability testing for terminal login to the master station after switching operator networks and reliability testing for terminal login to the master station after module power failure and reset. The reliability testing for terminal login to the master station after switching operator networks includes the following steps: S1: Connect the terminal to the corresponding operator test module.

[0048] After removing the network communication module and SIM card from the terminal under test, connect it to the test module of each operator.

[0049] S2: After the terminal is powered on, the public network parameters are set through the host computer, and the corresponding operator test module is switched according to the operator network switching order of the terminal under test.

[0050] In one embodiment, the method for controlling the switching of the corresponding operator test module is to power on the operator test module, that is, to control the power-on of the corresponding operator test module through a switch according to the operator network switching order of the terminal under test. For example, the mobile operator module is powered on first, and the other operator test modules are powered off.

[0051] S3: Determine if the carrier is correct.

[0052] After powering on, obtain the ICCID of the SIM card corresponding to the operator test module and compare it to see if the ICCID belongs to the corresponding operator. If it does, proceed to the next step; otherwise, perform hardware initialization, i.e., power-down reset of the terminal and operator test module. After a second set time delay (the second set time is determined based on the power-down reset duration of the terminal and operator test module, such as 60 seconds), obtain the ICCID of the SIM card corresponding to the operator test module again for judgment. If the operator still fails after the first set number of consecutive attempts (such as 3 times), skip that operator test module and only perform reliability tests on terminal switching operator network login to the main station under other operator test modules.

[0053] S4: Monitor the terminal's login status to the main station.

[0054] Open the listening port to monitor the terminal's network status. After switching to each operator's test module, the terminal negotiates network login with the main station through that operator's network, for example, by initiating PPP dialing. If the PPP dialing is successful, the terminal successfully logs into the main station; if the PPP dialing fails, the terminal fails to log into the main station. The host computer reads and saves the login result. If the login is successful, switch to the next operator's test module; otherwise, wait for a first set time (e.g., 10 minutes) and check again. If the number of consecutive login failures exceeds the set number (e.g., 3 times), skip that operator's test module and only perform reliability tests on the terminal's switching operator network to log into the main station under other operator's test modules.

[0055] Repeat the above process for repeated testing until the reliability test of the terminal switching operator network to log in to the main station is completed.

[0056] The reliability test for terminal login to the main station after module power failure and reset includes the following steps: 1. After removing the network communication module and SIM card from the terminal under test, connect the corresponding operator test module according to the operator network used by the terminal under test.

[0057] 2. Configure public network parameters via the host computer to control the power-on of the corresponding operator test module.

[0058] For example, when it is necessary to test the reliability of the terminal re-identifying the operator and logging into the main station after the module corresponding to the mobile operator is powered off and reset, the power on of the mobile operator module is controlled.

[0059] 3. After the host computer determines that the corresponding SIM card operator is correct, it monitors the terminal's login status to the main station.

[0060] Open the listening port to monitor the terminal's network status. After the operator test module is powered on, the terminal negotiates network login with the main station through the operator's network, for example, by initiating PPP dialing. If the PPP dialing is successful, the terminal successfully logs into the main station; if the PPP dialing fails, the terminal fails to log into the main station. The host computer reads and saves the login result. If the login is successful, the corresponding operator test module is powered off. After a second set time delay, the corresponding operator test module is powered on again. The test is repeated until the reliability test task of the terminal logging into the main station after the module is powered off and reset is completed (i.e., the number of tests is greater than the expected number of tests). If the login fails, wait for a first set time (e.g., 10 minutes) and then check again. If the number of consecutive login failures is greater than the set number (e.g., 3 times), the loop is terminated and the test ends.

[0061] This invention designs multiple carrier testing modules in its hardware structure, each including a network communication module and a corresponding carrier SIM card, covering all carriers supported by the terminal. Simultaneously, it develops host computer software to track the entire terminal login process, controlling the power-on switching of the carrier testing modules via a control switch. This enables automated cyclic testing of terminal login to the main station under multi-carrier networks, effectively reducing testing time and improving efficiency by at least two times. It saves at least one human testing personnel, allowing for 24-hour uninterrupted testing compared to the original 8-hour manual testing time, shortening the testing cycle to one-third of the original. The host computer can statistically analyze and visually display login data, avoiding data omissions caused by human fatigue, negligence, or other subjective reasons, thus improving data reliability. During the login process, the host computer saves process logs, allowing for quick analysis and location of login failures and abnormal logins. Automated testing also reduces information security risks to communication cards, comprehensively improving the management level of the entire communication card lifecycle.

Claims

1. An automatic testing method for the reliability of terminal login to a main station, characterized in that, This includes reliability testing of terminal login to the main site when switching carrier networks. This reliability testing includes: After removing the network communication module and SIM card from the terminal under test, connect it to the test modules of each operator. Each operator test module includes a network communication module and a corresponding operator SIM card. The host computer sets public network parameters and controls the switching of corresponding operator test modules according to the operator network switching order of the terminal under test. After switching to each operator test module, if the corresponding SIM card operator is correct, the login status of the terminal to the main station is monitored. If the login is successful, the next operator test module is switched. Otherwise, the login status is checked again after a first set time. The test is repeated until the reliability test task of the terminal switching operator network to log in to the main station is completed.

2. The automatic reliability testing method for terminal login master station according to claim 1, characterized in that, If login still fails after the first set delay time, the terminal and carrier test module will be power-off and reset, and the test will restart. If the number of consecutive login failures exceeds the set number, the carrier test module will be skipped, and only the reliability test of terminal switching carrier network login to the main station under other carrier test modules will be performed.

3. The automatic test method for terminal login master station reliability according to claim 1 or 2, characterized in that, It also includes reliability testing of terminal login to the main station after module power failure and reset, including: removing the network communication module and SIM card from the terminal under test and connecting the corresponding operator test module; setting public network parameters through the host computer and controlling the power-on of the corresponding operator test module; after determining that the corresponding SIM card operator is correct, monitoring the terminal's login status to the main station; if the login is successful, controlling the corresponding operator test module to power off; after a second set time delay, controlling the corresponding operator test module to power on again, and repeating this test until the reliability test task of terminal login to the main station after module power failure and reset is completed; if the login fails, waiting for a first set time and then judging again; if the number of consecutive login failures exceeds the set number, the test ends.

4. The automatic test method for terminal login master station reliability according to claim 1 or 2, characterized in that, The method for controlling the switching of the corresponding operator test module is to power on the operator test module and power off the other operator test modules. Powering on and off the operator test modules is achieved by controlling the switches set on the power supply lines of each operator test module through the host computer.

5. The automatic test method for terminal login master station reliability according to claim 1 or 2, characterized in that, The host computer is also used to count and display the number of successful and failed login attempts of terminals under each operator's network to the main station.

6. An automatic testing device for the reliability of terminal login master stations, characterized in that, The system includes a host computer and various operator testing modules. Each operator testing module includes a network communication module and a corresponding operator SIM card. The host computer is used to set public network parameters. During the reliability test of terminal switching operator network login to the main station, it controls the switching of the corresponding operator testing module according to the operator network switching order of the terminal under test. After switching to each operator testing module, after verifying that the corresponding SIM card operator is correct, it monitors the terminal's login status to the main station. If login fails, it delays for a first set time and then checks the login status again. If login is successful, it switches to the next operator testing module; otherwise, it waits for the first set time and then checks the login status again. This process is repeated until the reliability test task of terminal switching operator network login to the main station is completed.

7. The automatic terminal login master station reliability testing device according to claim 6, characterized in that, The host computer is also used to, if the terminal still fails to log in after a first set delay, power off and reset the terminal and the operator test module, and then re-monitor the terminal's login status to the main station after determining that the corresponding SIM card operator is correct. If the number of consecutive login failures of the terminal exceeds a set number, the host computer will skip the operator test module and control the switching to other operator test modules.

8. The automatic terminal login master station reliability testing device according to claim 6 or 7, characterized in that, Each operator's test module has a corresponding switch on its power supply line. The host computer is also used to set public network parameters and control the power-on of the corresponding operator's test module through the switch when the terminal logs into the main station after the module is powered off and reset. After determining that the corresponding SIM card operator is correct, the host computer listens to the terminal's login status to the main station. If the login is successful, the host computer controls the corresponding operator's test module to power off through the switch. After power-off, the host computer controls the corresponding operator's test module to power on after a second set time delay. This process is repeated until the reliability test task of the terminal logging into the main station after the module is powered off and reset is completed.

9. The automatic terminal login master station reliability testing device according to claim 8, characterized in that, The host computer switches between corresponding operator test modules by controlling the power on of the corresponding operator test module and the power off of other operator test modules through a switch.

10. The automatic terminal login master station reliability testing device according to claim 6 or 7, characterized in that, The host computer is also used to count and display the number of times terminals successfully and unsuccessfully log in to the main station under each operator's network.

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