Communication device

Abstract

The present disclosure provides a communication device, belonging to the technical field of communication. The communication device comprises a device main body, an in-place detection board, a single board and a false board. The device main body comprises a plurality of slot positions, which are used for inserting the single board or the false board. The slot position is provided with a single board in-place detection piece and a false board in-place detection piece. The single board can change the level state of the single board in-place detection piece by plugging in or out of the slot position. The false board can change the level state of the false board in-place detection piece by plugging in or out of the slot position. The in-place detection board is electrically connected with the single board in-place detection piece and the false board in-place detection piece. The in-place detection board is configured to determine that the slot position is in an empty state, a single board in-place state or a false board in-place state based on the level state of the single board in-place detection piece and the level state of the false board in-place detection piece. In this way, the communication device can timely remind the maintenance personnel to insert the false board in the empty slot position, and can timely remind the maintenance personnel to repair the faulty single board.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication device. Background Technology

[0002] Communication equipment consists of a main body, a main control board, and multiple individual boards, including service boards and switching boards. The main body includes multiple slots, and the individual boards are plugged into these slots. Depending on actual service requirements, the communication equipment may not need to be fully equipped with individual boards, leaving some slots empty. Empty slots typically require the insertion of dummy panels to prevent dust accumulation and ensure smooth airflow for heat dissipation.

[0003] In related technologies, to prevent users from forgetting to insert dummy panels into empty slots, a single-board presence detection device is reused to identify whether the dummy panel is in place. This single-board presence detection device is typically a pin of the slot's connector. When the single board mates with the slot's connector, it grounds this pin, allowing the main control board to determine the single board's presence based on the pin's voltage level change. In related technologies, a connector and corresponding grounding circuit are also provided on the dummy panel. When the dummy panel's connector mates with the slot's connector, the grounding circuit on the dummy panel also grounds this pin, allowing the main control board to determine whether the slot is empty based on the pin's voltage level change. Furthermore, to easily distinguish between a single board and a dummy panel in place, the main control board can send a message to the board in the slot. Boards that respond to the message are single boards, while those that do not respond are dummy panels.

[0004] However, when a single board fails, it is unable to send a message back to the main control board. In this situation, the main control board cannot distinguish between a working single board and a dummy panel, making it impossible to promptly remind the user to repair the faulty single board. Summary of the Invention

[0005] This disclosure provides a communication device. The communication device can identify whether a slot is vacant and can distinguish between a single board and a dummy panel. The technical solution of the communication device is described below.

[0006] This disclosure provides a communication device. The communication device includes a device body, an in-situ detection board, a single board, and a dummy panel. The device body includes multiple slots for inserting a single board or a dummy panel. Each slot is equipped with a single board in-situ detection element and a dummy panel in-situ detection element. The single board can change the voltage level of the single board in-situ detection element by inserting or removing it from the slot. The dummy panel can change the voltage level of the dummy panel in-situ detection element by inserting or removing it from the slot. The in-situ detection board is electrically connected to the single board in-situ detection element and the dummy panel in-situ detection element. The in-situ detection board is configured to determine whether a slot is in an empty state, a single board in-situ state, or a dummy panel in-situ state based on the voltage level of the single board in-situ detection element and the voltage level of the dummy panel in-situ detection element.

[0007] Among them, the in-situ detection board can be the main control board, backplane, power board, or monitoring board of the monitoring surface of the communication equipment.

[0008] The technical solution provided in this disclosure, by setting a single-board presence detection component and a dummy panel presence detection component in the slots of the main body of the equipment, enables the presence detection board to determine whether a single board is in place based on the voltage level of the single-board presence detection component, and to determine whether a dummy panel is in place based on the voltage level of the dummy panel presence detection component. Furthermore, the aforementioned presence detection does not rely on information exchange between the single board and the presence detection board; even if a single board malfunctions, the presence detection board can still identify whether the in-place component is a single board or a dummy panel. In this way, the presence detection board can promptly remind maintenance personnel to insert a dummy panel in an empty slot and can also promptly remind maintenance personnel to repair a faulty single board.

[0009] In one possible implementation, the presence detection board is electrically connected to a single-board presence detection device and a dummy panel presence detection device in the same slot via the same presence detection signal line. The single-board presence detection device can switch from a first level state to a second level state by inserting into the slot. The dummy panel presence detection device can switch from a first level state to a third level state by inserting into the slot. The presence detection board is configured to: determine that the slot is empty in response to the presence detection signal line being in the first level state; determine that the slot is in a single-board presence state in response to the presence detection signal line being in the second level state; and determine that the slot is in a dummy panel presence state in response to the presence detection signal line being in the third level state. The first, second, and third level states are three different voltage levels.

[0010] The technical solution provided in this disclosure allows the in-situ detection board to be electrically connected to the single-board in-situ detection device and the dummy panel in-situ detection device in the same slot via the same in-situ detection signal line. This does not increase the number of in-situ detection signal lines, which is beneficial for slot selection, connector selection of the in-situ detection board, and circuit design. Furthermore, in related technologies, the in-situ detection signal line only has two voltage levels: high and low. These two voltage levels cannot distinguish the three states of the slot. In the technical solution provided in this disclosure, the single-board in-situ detection device switches between a first voltage level and a second voltage level, and the dummy panel in-situ detection device switches between a first voltage level and a third voltage level. Thus, the in-situ detection signal line has three voltage levels: a first voltage level, a second voltage level, and a third voltage level. This allows the in-situ detection board to distinguish the three states of the slot based on these three voltage levels: idle state, single-board in-situ state, and dummy panel in-situ state.

[0011] In one possible implementation, the presence detection board includes a presence detection circuit, and the communication device further includes a first signal output circuit, a second signal output circuit, and a third signal output circuit. The presence detection circuit is electrically connected to single-board presence detection devices and dummy panel presence detection devices in multiple slots via multiple presence detection signal lines. Multiple first signal output circuits are used, each electrically connected to a different presence detection signal line, to bring the presence detection signal line to a first voltage level. The single-board presence detection device is used to enable the presence detection signal line to conduct through the second signal output circuit, and the second signal output circuit is used to bring the presence detection signal line to a second voltage level. The dummy panel presence detection device is used to enable the presence detection signal line to conduct through the third signal output circuit, and the third signal output circuit is used to bring the presence detection signal line to a third voltage level.

[0012] The first, second, and third signal output circuits are used to output different level signals to achieve the aforementioned different first, second, and third level signals. When the board is not inserted into the slot, the presence detection signal line and the second signal output circuit are disconnected. When the board is inserted into the slot, the board presence detection device will conduct through the presence detection signal line and the second signal output circuit. Thus, the board can switch between the first and second level states by inserting or removing it from the slot. When the dummy panel is not inserted into the slot, the presence detection signal line and the third signal output circuit are disconnected. When the dummy panel is inserted into the slot, the dummy panel presence detection device will conduct through the presence detection signal line and the third signal output circuit. Thus, the dummy panel can switch between the first and third level states by inserting or removing it from the slot.

[0013] In one possible implementation, the first signal output circuit is a high-level signal output circuit. One of the second and third signal output circuits is a ground circuit, and the other is a high-low level alternating signal output circuit. The first level state is a high-level state. One of the second and third level states is a low-level state, and the other is a high-low level alternating state. The high-level signal output circuit, the ground circuit, and the high-low level alternating signal output circuit are relatively easy to implement.

[0014] In one possible implementation, the second signal output circuit is a ground circuit, and the third signal output circuit is a high-low level alternating signal output circuit. The second level state is a low level state, and the third level state is a high-low level alternating state.

[0015] In the technical solution provided in this disclosure, when neither the single board nor the dummy panel is inserted into the slot, the single board's in-situ detection device is not grounded, and the dummy panel's in-situ detection device does not connect the high-low level alternating signal output circuit with the in-situ detection signal line, then under the action of the high-level signal output by the high-level signal output circuit, the in-situ detection signal line is in a high-level state (i.e., the first level state).

[0016] When the board is inserted into the slot, the board's in-situ detection component is grounded, and the in-situ detection signal line is grounded and in a low-level state (i.e., the second level state).

[0017] When the dummy panel is inserted into the slot, the board presence detection element is not grounded. The dummy panel presence detection element connects the high / low level alternating signal output circuit to the presence detection signal line. At this time, the level state of the presence detection signal line depends on whether the high / low level alternating signal output circuit outputs a high-level signal or a low-level signal. When the high / low level alternating signal output circuit outputs a high-level signal, the presence detection signal line is in a high-level state. When the high / low level alternating signal output circuit outputs a low-level signal, the presence detection signal line is in a low-level state. Because the high / low level alternating signal output circuit outputs alternating high-level and low-level signals, the presence detection signal line is in a high / low level alternating state (i.e., the third level state).

[0018] In one possible implementation, when the slot is vacant, the high / low level alternating signal output circuit outputs a low-level signal. The presence detection circuit is configured to: control the high / low level alternating signal output circuit to output an alternating high / low level signal in response to the presence detection signal line switching from a high-level state to a low-level state; determine that the slot is in a board presence state in response to the presence detection signal line being in an alternating high / low level state; and determine that the slot is in a dummy panel presence state in response to the presence detection signal line being in an alternating high / low level state. In this way, the high / low level alternating signal does not need to be constantly outputting alternating high and low level signals, which helps reduce power consumption.

[0019] In one possible implementation, the presence detection circuit is further configured to control the high / low level alternating signal output circuit to output a low-level signal after determining that the slot is in a dummy panel presence state. This reduces the power consumption of the second signal output circuit.

[0020] In one possible implementation, the presence detection board is the main control board, and the presence detection circuit, high-level signal output circuit, and high-low level alternating signal output circuit are located on the main control board. The grounding circuit is located on a single board. This requires minimal modification to the dummy panel, which is beneficial for the implementation of the solution.

[0021] In one possible implementation, the dummy panel presence detection element includes a first contact and a second contact. The first contact is connected to a presence detection signal line, and the second contact is connected to a third signal output circuit. The dummy panel is used to enable conduction between the first and second contacts.

[0022] The technical solution provided in this disclosure eliminates the need for a third signal output circuit on the dummy panel through the above design, thereby reducing the improvement cost of the dummy panel.

[0023] In one possible implementation, the in-situ detection board is electrically connected to the single-board in-situ detection device and the dummy panel in-situ detection device via a first in-situ detection signal line and a second in-situ detection signal line, respectively. The in-situ detection board is configured to: determine whether the slot is in a single-board in-situ state based on the level state of the first in-situ detection signal line; and determine whether the slot is in a dummy panel in-situ state based on the level state of the second in-situ detection signal line.

[0024] The technical solution provided in this disclosure, through the aforementioned configuration, enables the in-situ detection board to distinguish the level states of the single-board in-situ detection device and the dummy panel in-situ detection device via different in-situ detection signal lines. This allows it to determine whether the slot is in a single-board in-situ state, a dummy panel in-situ state, or an empty state. Furthermore, since the in-situ detection board can distinguish the level states of the single-board in-situ detection device and the dummy panel in-situ detection device via different in-situ detection signal lines, the two level states of the single-board in-situ detection device and the two level states of the dummy panel in-situ detection device can be the same. For example, both can be a high level state and a low level state. This helps reduce the number of different level states, thereby reducing the number of signal output circuits.

[0025] In one possible implementation, the single-board can switch its on-state detection from a high-level state to a low-level state by inserting into a slot. The dummy panel can switch its on-state detection from a high-level state to a low-level state by inserting into a slot. The on-state detection board is configured to: determine that the slot is empty in response to both the first and second on-state detection signal lines being high; determine that the slot is in a single-board on-state in response to the first on-state detection signal line being low; and determine that the slot is in a dummy panel on-state in response to the second on-state detection signal line being low. The high-level and low-level states are relatively easy to implement, which simplifies the circuit.

[0026] In one possible implementation, the presence detection board includes a presence detection circuit, and the communication device further includes multiple first signal output circuits. The presence detection circuit is electrically connected to single-board presence detection devices in multiple slots via multiple first presence detection signal lines, and is also electrically connected to dummy panel presence detection devices in multiple slots via multiple second presence detection signal lines. Each first signal output circuit is electrically connected to one first presence detection signal line or one second presence detection signal line, and the first signal output circuit is used to output a high-level signal. The single-board is used to ground the first presence detection signal line via the single-board presence detection device. The dummy panel is used to ground the second presence detection signal line via the dummy panel presence detection device.

[0027] The technical solution provided in this disclosure states that when the board is not inserted into the slot, the first presence detection signal line is not grounded, and under the action of the high-level signal output by the first signal output circuit, the first presence detection signal line is in a high-level state. When the board is inserted into the slot, the first presence detection signal line is grounded, which causes the first presence detection signal line to be in a low-level state.

[0028] When the dummy panel is not inserted into the slot, the second presence detection signal line is not grounded, and therefore, under the influence of the high-level signal output by the first signal output circuit, the second presence detection signal line is in a high-level state. When the dummy panel is inserted into the slot, the second presence detection signal line is grounded, which causes the second presence detection signal line to be in a low-level state.

[0029] In one possible implementation, the dummy panel presence detection element includes a first contact and a second contact. The first contact is connected to a second presence detection signal line, and the second contact is grounded. The dummy panel is used to enable conduction between the first and second contacts. This eliminates the need for a grounding circuit on the dummy panel, reducing the cost of its improvement.

[0030] In one possible implementation, the dummy panel includes a jumper, the two ends of which are respectively used to contact a first contact and a second contact, so that the first contact and the second contact are electrically connected through the jumper. The jumper is a metal component and is conductive.

[0031] The technical solution provided in this disclosure short-circuits the first and second contacts by setting a shorting component. Compared with the technical solution in related technologies that sets a connector and corresponding grounding circuit on a dummy panel, the improvement of the dummy panel is small, which helps to reduce the cost of the dummy panel and makes the dummy panel more reliable.

[0032] In one possible implementation, the shorting connector is an elastic component that can elastically expand and contract in the insertion / removal direction of the dummy panel. This allows the shorting connector to absorb the tolerances between the dummy panel and the back plate in the depth direction of the slot, reducing the dimensional accuracy requirements of the dummy panel in the depth direction. Furthermore, under the action of the shorting connector's own elasticity, the shorting connector tightly abuts against the first and second contacts, thus improving the reliability of the contact between the shorting connector and the first and second contacts.

[0033] In one possible implementation, the dummy panel presence detection element includes a switch, which includes a first contact and a second contact. The dummy panel is used to contact the switch to establish conductivity between the first and second contacts. The switch is closed in a pressed state and open in a released state. When the dummy panel is inserted into the slot, it abuts against the switch, keeping it in the closed state (i.e., the first and second contacts are conductive). When the dummy panel is removed from the slot, the switch loses its obstruction and automatically springs back, keeping the first and second contacts in the open state.

[0034] The technical solution provided in this disclosure, by setting the switch to include a first contact and a second contact, eliminates the need for conductive components (such as circuits and shorting components) on the dummy panel. The improvement to the dummy panel is minor, which helps to reduce the cost of the dummy panel and makes the dummy panel more reliable.

[0035] In one possible implementation, the slot is provided with a first connector, one pin of which forms a board-in-place detection element. The board includes a second connector, which includes a ground pin for mating with the board-in-place detection element.

[0036] In one possible implementation, the main body of the device includes a back panel, which is equipped with a single panel in-situ detection component and a dummy panel in-situ detection component. Attached Figure Description

[0037] Figure 1 This is a 3D schematic diagram of a communication device with a fully configured single-board unit;

[0038] Figure 2 This is a schematic diagram of a communication device with an incomplete set of circuit boards;

[0039] Figure 3 This is a schematic diagram of a communication device equipped with a dummy panel according to an embodiment of this disclosure;

[0040] Figure 4 This is a schematic diagram of a communication device that is not in a fully configured state according to an embodiment of this disclosure;

[0041] Figure 5 This is a schematic diagram of a single board, a dummy panel, and a back panel connected according to an embodiment of this disclosure;

[0042] Figure 6 This is a schematic diagram of a correlation circuit for in-situ detection provided in an embodiment of this disclosure;

[0043] Figure 7 This is a schematic diagram of a circuit for detecting the presence of a single board when it is in place, provided in an embodiment of this disclosure.

[0044] Figure 8 This is a schematic diagram of a circuit for detecting the presence of a dummy panel when it is in place, provided in an embodiment of this disclosure.

[0045] Figure 9 This is a schematic diagram of another in-situ detection related circuit provided in an embodiment of this disclosure;

[0046] Figure 10 This is a schematic diagram of another in-situ detection related circuit provided in an embodiment of this disclosure;

[0047] Figure 11 This is a schematic diagram of another circuit for detecting the presence of a single board in place, provided in an embodiment of this disclosure;

[0048] Figure 12 This is a schematic diagram of another circuit for detecting the presence of a dummy panel in an embodiment of this disclosure;

[0049] Figure 13 This is a schematic diagram of another in-situ detection related circuit provided in an embodiment of this disclosure;

[0050] Figure 14 This is a schematic diagram of another in-situ detection related circuit provided in an embodiment of this disclosure;

[0051] Figure 15 This is a schematic diagram of another circuit for detecting the presence of a single board in place, provided in an embodiment of this disclosure;

[0052] Figure 16 This is a schematic diagram of another in-situ detection circuit for a dummy panel provided in an embodiment of this disclosure.

[0053] Legend

[0054] 1. Equipment body; 10. Slot; 11. Single board in-situ detection component; 12. Dummy panel in-situ detection component; 100. Back plate;

[0055] 2. Main control board, 200. In-situ detection signal line, 201. First in-situ detection signal line, 202. Second in-situ detection signal line, 21. In-situ detection circuit, 22. First signal output circuit, 220. Signal transmission line, 221. Power supply, 222. Pull-up resistor, 23. Third signal output circuit;

[0056] 3. Single board; 31. Second connector; 32. Second signal output circuit;

[0057] 4. False panel; 41. Shorting connector;

[0058] 5. Power supply board;

[0059] 6. Fan. Detailed Implementation

[0060] Figure 1 A three-dimensional schematic diagram of a fully equipped communication device with a single board is shown. Figure 2 A schematic diagram of a communication device with an incomplete configuration of individual boards is shown. Figure 1 and Figure 2 As shown, the communication equipment includes a main body 1, a main control board 2, individual boards 3, a power supply board 5, and a cooling fan 6. The main body 1 includes multiple slots 10, in which the individual boards 3 are inserted. The main control board 2 manages each individual board 3. The individual boards 3 include service boards and interface boards, etc. The power supply board 5 supplies power to the communication equipment. The cooling fan 6 provides air cooling for the communication equipment.

[0061] To meet the diverse application needs of customers, communication equipment often supports hot-swapping of boards 3, providing customers with the required board combinations and supporting flexible adjustments. This requires the main control board 2 to be able to promptly identify whether the boards 3 in each slot 10 are in place, in order to manage the boards 3. Figure 2 As shown, to achieve the presence detection of board 3, a board presence detection component 11 is provided in each slot 10. The board presence detection component 11 is generally a pin of the connector located in slot 10. When board 3 is inserted into slot 10, board 3 grounds this pin. This causes the pin to switch from a high-level state to a low-level state, and the main control board 2 can determine the presence of board 3 based on this level change.

[0062] Furthermore, for vacant slot 10, the cooling airflow of the communication equipment may leak from the opening of the vacant slot 10, which will correspondingly reduce the cooling airflow through other slots per unit time, affecting the heat dissipation of the single board 3 in other slots. Therefore, if Figure 3 As shown, it is generally required that a dummy panel 4 be inserted into an empty slot 10 to prevent airflow from leaking out of the empty slot 10. In addition, the dummy panel 4 also serves to reduce dust being brought in from the panel side, thus delaying the corrosion and aging of the equipment.

[0063] The dummy panel 4 is a structural component that lacks operational functionality and does not have a circuit board to provide the necessary circuitry for in-situ detection. In actual equipment operation and maintenance, due to negligence or insufficient attention from maintenance personnel, the dummy panel 4 may be removed and forgotten, resulting in the empty slot 10 not being used to insert the dummy panel 4. This can lead to poor heat dissipation, dust accumulation and aging of the communication equipment, and even affect the normal operation of the communication equipment, resulting in serious consequences such as communication service interruption.

[0064] In related technologies, to prevent users from forgetting to install the dummy panel 4, the single-board presence detection component 11 is reused to identify whether the dummy panel 4 is in place. Specifically, a connector and a corresponding grounding circuit are added to the dummy panel 4. When the connector of the dummy panel 4 is connected to the connector of the slot 10, the grounding circuit on the dummy panel 4 also grounds the pin (single-board presence detection component 11). Then, the main control board 2 can also determine that a board exists in the slot 10 based on the state change of the pin from a high level to a low level. In addition, to facilitate distinguishing whether the slot 10 is occupied by a single board or a dummy panel, the main control board 2 can send a message to the board in the slot 10. The board that can reply to the message is the single board 3, and the board that cannot reply to the message is the dummy panel 4.

[0065] However, when board 3 malfunctions, it is unable to send messages back to main control board 2. At this time, main control board 2 cannot distinguish whether board 3 or the fake board 4 is present, making it impossible to promptly notify the user to repair the faulty board 3.

[0066] In view of the above-mentioned technical problems, this disclosure provides a communication device. The main control board 2 of this communication device can not only identify whether a board is inserted in slot 10, but also, in the event of a faulty board 3, can identify whether the board 3 or a dummy board 4 is inserted in slot 10. Therefore, it can promptly prompt the user to repair the faulty board 3. The communication device provided in this disclosure will now be described by way of example.

[0067] Figure 4 and Figure 5 A schematic diagram of a communication device provided in an embodiment of this disclosure is shown. Figure 4 and Figure 5As shown, the communication device includes a main body 1, a main control board 2, a single board 3, and a dummy panel 4. The main body 1 includes multiple slots 10 for inserting either the single board 3 or the dummy panel 4. Each slot 10 is equipped with a single board presence detection element 11 and a dummy panel presence detection element 12. The single board 3 can change the voltage level of the single board presence detection element 11 by inserting or removing it from the slot 10. The dummy panel 4 can change the voltage level of the dummy panel presence detection element 12 by inserting or removing it from the slot 10. The main control board 2 is electrically connected to the single board presence detection element 11 and the dummy panel presence detection element 12. The main control board 2 is configured to determine whether the slot 10 is in an empty state, a single board presence state, or a dummy panel presence state based on the voltage level of the single board presence detection element 11 and the voltage level of the dummy panel presence detection element 12.

[0068] This communication device can be an optical line terminal (OLT) or a switch, etc. In some examples, such as... Figure 5 As shown, the device body 1 includes a backplate 100, which is provided with a single-board presence detection element 11 and a dummy panel presence detection element 12. Of course, in some other examples, the device body 1 may not include the backplate 100. For example, the communication device may be an orthogonal architecture communication device. Additionally, the device body 1 also includes a chassis, which includes structural portions of slots 10.

[0069] The technical solution provided in this embodiment of the invention, by setting a single-board presence detection element 11 and a dummy panel presence detection element 12 in the slot 10 of the main body 1, enables the main control board 2 to determine whether the single-board 3 is in place based on the voltage level of the single-board presence detection element 11, and to determine whether the dummy panel 4 is in place based on the voltage level of the dummy panel presence detection element 12. In this way, the main control board 2 can promptly remind maintenance personnel to insert the dummy panel 4 into an empty slot 10, and can promptly remind maintenance personnel to repair faulty single-board 3.

[0070] It should be noted that the main control board 2 mentioned above can also be replaced by other boards. That is, in the technical solution of this disclosure embodiment, the in-situ detection board used for in-situ detection can be the main control board 2, or it can be other boards such as the backplane 100, the power board 5, and the monitoring board on the monitoring surface. Below, the technical solution provided by this disclosure embodiment will be described using the in-situ detection board as the main control board 2 as an example.

[0071] Understandably, to achieve the above functions, the main control board 2 should be able to distinguish whether the detected change in the level state is caused by the single board presence detection element 11 or the dummy panel presence detection element 12. This disclosure provides two implementation methods. The first implementation method is to make the change in the level state of the single board presence detection element 11 different from the change in the level state of the dummy panel presence detection element 12. Then, the main control board 2 can directly distinguish which presence detection element caused the change based on the level state, and thus distinguish whether the slot 10 is occupied by the single board 3 or the dummy panel 4.

[0072] The second implementation method is that the main control board 2 connects the single-board presence detection component 11 and the dummy panel presence detection component 12 through different presence detection signal lines. In this way, the main control board 2 can distinguish which presence detection component is causing the change based on the level state of which presence detection signal line, and thus distinguish whether the slot 10 is occupied by the single-board 3 or the dummy panel 4.

[0073] The two implementation methods described above will be illustrated below.

[0074] (1) As Figure 6 As shown, the main control board 2 is electrically connected to the single-board presence detection element 11 and the dummy panel presence detection element 12 in the same slot 10 via the same presence detection signal line 200. The single-board 3 can switch the single-board presence detection element 11 from a first level state to a second level state by being inserted into slot 10. The dummy panel 4 can switch the dummy panel presence detection element 12 from a first level state to a third level state by being inserted into slot 10. The main control board 2 is configured to: determine that slot 10 is in an empty state in response to the presence detection signal line 200 being in a first level state; determine that slot 10 is in a single-board presence state in response to the presence detection signal line 200 being in a second level state; and determine that slot 10 is in a dummy panel presence state in response to the presence detection signal line 200 being in a third level state.

[0075] Since the main control board 2 is the control core of the communication equipment, it has numerous signal connections with each single board 3 (or slot 10). Therefore, given that there are already presence detection signal lines 200 between the main control board 2 and each slot 10 for identifying whether a single board 3 is in place, adding another set of presence detection signal lines 200 for identifying whether a dummy panel 4 is in place would put considerable pressure on the selection of connectors between the main control board 2 and the slot 10. However, the technical solution provided in this embodiment, by setting the main control board 2 to be electrically connected to the single board presence detection component 11 and the dummy panel presence detection component 12 in the same slot 10 via the same presence detection signal line 200, does not increase the number of presence detection signal lines 200, which is beneficial for the selection of connectors for the slot 10 and the main control board 2, as well as for circuit design.

[0076] Furthermore, in related technologies, the presence detection signal line 200 only has two voltage levels: a high level and a low level. These two voltage levels cannot distinguish the three states of slot 10. However, the technical solution provided in this embodiment uses a single board 3 to allow the single board presence detection element 11 to switch between a first voltage level and a second voltage level, and a dummy panel 4 to allow the dummy panel presence detection element 12 to switch between a first voltage level and a third voltage level. Thus, the presence detection signal line 200 has a total of three voltage levels: a first voltage level, a second voltage level, and a third voltage level. Therefore, the main control board 2 can distinguish the three states of slot 10 based on these three voltage levels: idle state, single board presence state, and dummy panel presence state.

[0077] The first, second, and third level states mentioned above represent three different voltage levels. For example, the first level state is a high-level state. One of the second and third level states is a low-level state, and the other is an alternating high-low level state (or a medium-level state). The low-level state can be a grounded state.

[0078] In some examples, such as Figure 6 As shown, the main control board 2 includes an in-situ detection circuit 21, multiple first signal output circuits 22, and a third signal output circuit 23. Figure 7 As shown, board 3 also includes a second signal output circuit 32. For example... Figure 6 As shown, the presence detection circuit 21 is electrically connected to the single-board presence detection element 11 and the dummy panel presence detection element 12 of the slot 10 via multiple presence detection signal lines 200. Multiple first signal output circuits 22 are electrically connected to the multiple presence detection signal lines 200, and the first signal output circuits 22 cause the presence detection signal lines 200 to be in a first level state. Figure 7 As shown, board 3 is used to enable board presence detection 11 to conduct presence detection signal line 200 and second signal output circuit 32, and second signal output circuit 32 is used to enable presence detection signal line 200 to be in the second level state. Dummy board 4 is used to enable dummy board presence detection 12 to conduct presence detection signal line 200 and third signal output circuit 23, and third signal output circuit 23 is used to enable presence detection signal line 200 to be in the third level state.

[0079] Among them, such as Figure 6 As shown, when neither board 3 nor dummy board 4 is inserted into slot 10, board in-place detection component 11 does not conduct in-place detection signal line 200 and second signal output circuit 32. Under the action of first signal output circuit 22, in-place detection signal line 200 is in the first level state.

[0080] like Figure 7As shown, when board 3 is inserted into slot 10, board in-situ detection component 11 will turn on the in-situ detection signal line 200 and the second signal output circuit 32. Under the action of the second signal output circuit 32, the in-situ detection signal line 200 will be in the second level state.

[0081] like Figure 8 As shown, when the dummy panel 4 is inserted into the slot 10, the dummy panel in-place detection component 12 will connect the in-place detection signal line 200 with the third signal output circuit 23. Under the action of the third signal output circuit 23, the in-place detection signal line 200 will be in the third level state.

[0082] In some examples, such as Figure 7 As shown, the first signal output circuit 22 is a high-level signal output circuit, and the second signal output circuit 32 is a ground circuit. The third signal output circuit 23 is a high-low level alternating signal output circuit. Accordingly, the first level state is a high-level state, the second level state is a low-level state, and the third level state is a high-low level alternating state. The high-low level alternating signal output circuit can be replaced with a medium-level signal output circuit, thus replacing the high-low level state with a medium-level state.

[0083] Figure 6 As shown, when neither board 3 nor dummy board 4 is inserted into slot 10, board in-situ detection component 11 is not grounded, and dummy board in-situ detection component 12 does not connect the third signal output circuit 23 to the in-situ detection signal line 200. Under the action of the high-level signal output by the first signal output circuit 22, the in-situ detection signal line 200 is in a high-level state.

[0084] like Figure 7 As shown, when board 3 is inserted into slot 10, board in-situ detection component 11 is grounded, which causes in-situ detection signal line 200 to be in a low-level state.

[0085] like Figure 8 As shown, when the dummy panel 4 is inserted into the slot 10, the dummy panel in-place detection component 12 will connect the in-place detection signal line 200 with the high-low level alternating signal output circuit. Under the action of the high-low level alternating signal output circuit, the in-place detection signal line 200 is in a high-low level alternating state.

[0086] In some examples, such as Figure 9 As shown, the third signal output circuit 23 can also be set on the back panel 100.

[0087] In some examples, such as Figures 6-8 As shown, the first signal output circuit 22 includes a power supply 221 and a pull-up resistor 222. One end of the pull-up resistor 222 is connected to the power supply 221, and the other end is connected to the in-position detection signal line 200.

[0088] It should be noted that the third signal output circuit 23 can always be in a state of outputting alternating high-level and low-level signals, or it can only be in a state of outputting alternating high-level and low-level signals when bit detection is required. Examples will be provided below.

[0089] In some examples, when slot 10 is vacant, the third signal output circuit 23 outputs alternating high and low level signals. The presence detection circuit 21 is configured to: determine that slot 10 is vacant in response to the presence detection signal line 200 being high; determine that slot 10 is in board presence in response to the presence detection signal line 200 being low; and determine that slot 10 is in dummy board presence in response to the presence detection signal line 200 alternating between high and low levels. This simplifies the control logic of the third signal output circuit 23, allowing the presence detection circuit 21 to operate without controlling the third signal output circuit 23.

[0090] In other examples, when slot 10 is vacant, the third signal output circuit 23 outputs a low-level signal. The presence detection circuit 21 is configured to: control the third signal output circuit 23 to output alternating high-level and low-level signals in response to the presence detection signal line 200 switching from a high-level state to a low-level state; determine that slot 10 is in a board-in-situ state in response to the presence detection signal line 200 being in a low-level state; and determine that slot 10 is in a dummy panel-in-situ state in response to the presence detection signal line 200 alternating between high and low levels. This helps reduce the power consumption of the third signal output circuit 23. Specifically, when the presence detection signal line 200 switches from a high-level state to a low-level state, it indicates that a board 3 has been inserted into slot 10. By controlling the third signal output circuit 23 to output alternating high-level and low-level signals and identifying the level state of the presence detection signal line 200, it is possible to further distinguish whether the board in position is board 3 or a dummy panel 4.

[0091] In addition, the presence detection circuit 21 is also configured to control the third signal output circuit 23 to output a low-level signal after determining that the slot 10 is in a dummy panel presence state, so as to reduce power consumption.

[0092] In addition to the presence detection signal line 200, to connect the third signal output circuit 23 on the main control board 2 to the second contact 122 on the backplane 100, such as Figure 6 As shown, the communication device also requires an additional signal transmission line 220, which connects the third signal output circuit 23 on the main control board 2 to the second contact 122. Of course, in other examples, such as... Figure 9As shown, the third signal output circuit 23 can also be set on the backplane 100, which eliminates the need for the signal transmission line 220 between the main control board 2 and the backplane 100.

[0093] It should be noted that the presence detection signal line 200 includes the wiring portion located on the main control board 2, the presence detection pin of the connector on the main control board 2, the presence detection pin of the connector on the backplane 100 for mating with the main control board 2, and the wiring portion on the backplane 100.

[0094] In other examples, such as Figure 10 As shown, the first signal output circuit 22 can also be configured as a high-level signal output circuit, and the third signal output circuit 23 as a ground circuit. The second signal output circuit 32 is a high-low level alternating signal output circuit. Correspondingly, the first level state is a high-level state, the second level state is a high-low level alternating state, and the third level state is a low-level state. The high-low level alternating signal output circuit can be replaced with a medium-level signal output circuit, thus replacing the high-low level state with a medium-level state.

[0095] like Figure 10 As shown, when the single board 3 and the dummy panel 4 are not inserted into the slot 10, the in-position detection signal line 200 is in a high-level state under the action of the high-level signal output by the first signal output circuit 22.

[0096] like Figure 11 As shown, when board 3 is inserted into slot 10, board in-situ detection component 11 will connect the in-situ detection signal line 200 to the second signal output circuit 32. Under the action of the high and low level alternating signal output by the second signal output circuit 32, the in-situ detection signal line 200 will be in a high and low level alternating state.

[0097] like Figure 12 As shown, when the dummy panel 4 is inserted into the slot 10, the dummy panel in-place detection component 12 will ground the in-place detection signal line 200, thus making the in-place detection signal line 200 a low-level state.

[0098] (2) Figure 14 As shown, the main control board 2 is electrically connected to the single-board presence detection device 11 and the dummy panel presence detection device 12 via the first presence detection signal line 201 and the second presence detection signal line 202, respectively. The main control board 2 is configured to: determine whether the slot 10 is in a single-board presence state based on the level state of the first presence detection signal line 201; and determine whether the slot 10 is in a dummy panel presence state based on the level state of the second presence detection signal line 202.

[0099] The technical solution provided in this embodiment of the disclosure, by setting the main control board 2 to connect the single-board presence detection component 11 and the dummy panel presence detection component 12 through the first presence detection signal line 201 and the second presence detection signal line 202 respectively, enables the main control board 2 to distinguish the level state of the single-board presence detection component 11 and the dummy panel presence detection component 12 through different presence detection signal lines. Therefore, it is possible to determine whether the slot 10 is in a single-board presence state, a dummy panel presence state, or an empty state.

[0100] Furthermore, since the main control board 2 can distinguish the level states of the single-board presence detection device 11 and the dummy panel presence detection device 12 through different presence detection signal lines, the two level states of the single-board presence detection device 11 and the two level states of the dummy panel presence detection device 12 can be the same. For example, both can be a high level state and a low level state. This helps to reduce the number of level states, thereby reducing the number of level signal output circuits on the main control board 2 (for example, there is no need to set up a third signal output circuit 23).

[0101] For example, board 3 can switch the board presence detection element 11 from a high-level state to a low-level state by inserting it into slot 10. Dummy panel 4 can switch the dummy panel presence detection element 12 from a high-level state to a low-level state by inserting it into slot 10. Then, the main control board 2 is configured to: determine that slot 10 is empty in response to both the first presence detection signal line 201 and the second presence detection signal line 202 being at a high level; determine that slot 10 is in a board presence state in response to the first presence detection signal line 201 being at a low level; and determine that slot 10 is in a dummy panel presence state in response to the second presence detection signal line 202 being at a low level. The high-level and low-level states are relatively easy to implement, which helps simplify the circuit.

[0102] In some examples, such as Figure 14 As shown, the main control board 2 includes an in-situ detection circuit 21 and multiple first signal output circuits 22. The in-situ detection circuit 21 is electrically connected to the single-board in-situ detection elements 11 of multiple slots 10 via multiple first in-situ detection signal lines 201, and to the dummy panel in-situ detection elements 12 of multiple slots 10 via multiple second in-situ detection signal lines 202. Each first signal output circuit 22 is electrically connected to one first in-situ detection signal line 201 or one second in-situ detection signal line 202, and is used to output a high-level signal. The single-board 3 is used to ground the first in-situ detection signal line 201 via the single-board in-situ detection element 11. The dummy panel 4 is used to ground the second in-situ detection signal line 202 via the dummy panel in-situ detection element 12.

[0103] Among them, such as Figure 14As shown, when board 3 is not inserted into slot 10, board presence detection component 11 is not grounded. Therefore, under the influence of the high-level signal output by the first signal output circuit 22, the first presence detection signal line 201 is in a high-level state. For example... Figure 15 As shown, when board 3 is inserted into slot 10, board in-situ detection component 11 is grounded, which causes the first in-situ detection signal line 201 to be in a low-level state.

[0104] like Figure 14 As shown, when the dummy panel 4 is not inserted into the slot 10, the dummy panel presence detection element 12 does not ground the second presence detection signal line 202. Therefore, under the action of the high-level signal output by the first signal output circuit 22, the second presence detection signal line 202 is in a high-level state. Figure 16 As shown, when the dummy panel 4 is inserted into the slot 10, the dummy panel presence detection unit 12 grounds the second presence detection signal line 202, which makes the second presence detection signal line 202 low level.

[0105] based on Figures 14-16 The circuit shown has an in-situ detection circuit 21 configured to: determine that slot 10 is vacant in response to both the first in-situ detection signal line 201 and the second in-situ detection signal line 202 being at a high level; determine that slot 10 is in a single-board in-situ state in response to the first in-situ detection signal line 201 being at a low level; and determine that slot 10 is in a dummy panel in-situ state in response to the second in-situ detection signal line 202 being at a low level.

[0106] It should be noted that the first presence detection signal line 201 includes the wiring portion located on the main control board 2, the presence detection pin of the connector on the main control board 2, the presence detection pin of the connector on the backplane 100 for docking with the main control board 2, and the wiring portion on the backplane 100.

[0107] The second presence detection signal line 202 also includes the wiring portion located on the main control board 2, the presence detection pin of the connector on the main control board 2, the presence detection pin of the connector on the backplane 100 for mating with the main control board 2, and the wiring portion on the backplane 100.

[0108] The implementation of the single-board in-situ detection component 11 will be described below by way of example.

[0109] In some examples, slot 10 is provided with a first connector, one pin of which forms a board-in-place detection element 11. For example... Figure 7 and Figure 15 As shown, the single board 3 includes a second connector 31, which includes a grounding pin. The grounding pin is used to connect to the single board in-situ detection component 11 so that the single board in-situ detection component 11 is grounded. The grounding pin is connected to the grounding circuit on the single board 3.

[0110] The implementation of the dummy panel presence detection element 12 will be described below by way of example.

[0111] In some examples, the dummy panel presence detection element 12 includes a first contact 121 and a second contact 122. The first contact 121 is connected to the presence detection signal line 200 (e.g., Figures 6-13 (as shown), or, the second in-situ detection signal line 202 (as shown) Figures 14-16 (As shown) connected. The second contact 122 is connected to the third signal output circuit 23 (as shown). Figures 6-13 (as shown), or grounded (as shown) Figures 14-16 (As shown). The dummy panel 4 is used to make the first contact 121 and the second contact 122 conduct. In this way, no corresponding circuit is needed on the dummy panel 4, reducing the improvement cost of the dummy panel 4.

[0112] This disclosure does not limit the implementation method of the dummy panel 4 to make the first contact 121 and the second contact 122 conductive. In some examples, such as Figure 5 , Figure 8 and Figure 11 As shown, the dummy panel 4 includes a shorting member 41, which is a metal component and has electrical conductivity. The two ends of the shorting member 41 are used to contact the first contact 121 and the second contact 122, respectively, so that the first contact 121 and the second contact 122 are connected through the shorting member 41.

[0113] The technical solution provided in this disclosure provides a method to short-circuit the first contact 121 and the second contact 122 by setting a shorting member 41. Compared with the related technology of setting a connector and a corresponding grounding circuit on the dummy panel 4, the improvement of the dummy panel 4 is small, which helps to reduce the cost of the dummy panel 4 and the reliability of the dummy panel 4 is higher.

[0114] In some examples, to ensure the reliability of the contact between the shorting member 41 and the first contact 121 and the second contact 122, the shorting member 41 is designed as an elastic element, and it can elastically extend and retract in the insertion / removal direction of the dummy panel 4 (i.e., the depth direction of the slot 10). In this way, the shorting member 41 can absorb the tolerance between the dummy panel 4 and the back plate 100 in the depth direction of the slot 10, reducing the accuracy requirements for the dimensions of the dummy panel 4 in the depth direction. Furthermore, under the action of its own elastic force, the shorting member 41 abuts tightly against the first contact 121 and the second contact 122, thus improving the reliability of the contact between the shorting member 41 and the first contact 121 and the second contact 122. The shorting member 41 can be a set of connected elastic springs, a spring pin, or other components that can stabilize the electrical connection.

[0115] Furthermore, to ensure that the two ends of the shorting member 41 align with the first contact 121 and the second contact 122 after the dummy panel 4 is inserted into the slot 10, the area of ​​the first contact 121 and the second contact 122 can be increased to prevent misalignment between the two ends of the shorting member 41 and the first contact 121 and the second contact 122. For example, the area of ​​the first contact 121 and the area of ​​the second contact 122 are larger than the area of ​​the end of the shorting member 41. Even more exemplary, the area of ​​the first contact 121 and the area of ​​the second contact 122 are more than twice the area of ​​the end of the shorting member 41.

[0116] Besides the technical solution of setting the shorting element 41 to connect the first contact 121 and the second contact 122, in other examples, such as Figure 9 As shown, the dummy panel presence detection element 12 includes a switch, which includes a first contact 121 and a second contact 122. The dummy panel 4 is used to press the switch to make the first contact 121 and the second contact 122 conductive.

[0117] The switch is closed when pressed and open when released. When the dummy panel 4 is inserted into the slot 10, it presses against the switch, keeping it in the closed state (i.e., the first contact 121 and the second contact 122 are connected). When the dummy panel 4 is pulled out of the slot 10, the switch is no longer obstructed and automatically springs back, keeping the first contact 121 and the second contact 122 in the open state.

[0118] In addition, to ensure that the dummy panel 4 can press the switch, a protruding part can be added to the dummy panel 4, which is used to hold the switch in place.

[0119] The technical solution provided in this disclosure, by setting the switch to include a first contact 121 and a second contact 122, eliminates the need for conductive components (such as circuits and shorting components 41) on the dummy panel 4. The improvement of the dummy panel 4 is minor, which helps to reduce the cost of the dummy panel 4 and makes the dummy panel 4 more reliable.

[0120] It should be noted that the single-board presence detection component 11 described above can also be implemented using the same method as the dummy panel presence detection component 12. That is, the single-board presence detection component 11 includes two contacts: one contact is connected to the presence detection signal line 200, and the other contact is connected to the second signal output circuit 32. The single-board 3 is used to make the two contacts conduct, so that the presence detection signal line 200 is connected to the second signal output circuit 32, and the presence detection signal line 200 is in a second level state. Alternatively, one contact is connected to the first presence detection signal line 201, and the other contact is grounded. The single-board 3 is used to make the two contacts conduct, so that the first presence detection signal line 201 is in a low level state.

[0121] The aforementioned dummy panel presence detection element 12 can also be implemented in the same way as the aforementioned single-board presence detection element 11. That is, the dummy panel presence detection element 12 is a pin of the connector. The dummy panel 4 includes a connector, and the connector includes a presence detection pin, which is grounded or connected to the third signal output circuit 23. The presence detection pin is used to connect to the dummy panel presence detection element 12.

[0122] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. A communication device, characterized in that, The communication device includes a main body (1), an in-situ detection board, a single board (3), and a dummy panel (4); The main body (1) of the device includes multiple slots (10), the slots (10) are used for inserting the single board (3) or the dummy panel (4), and the slots (10) are provided with a single board in-situ detection component (11) and a dummy panel in-situ detection component (12); The single board (3) can change the level state of the single board in-situ detection element (11) by inserting or removing it in the slot (10), and the dummy panel (4) can change the level state of the dummy panel in-situ detection element (12) by inserting or removing it in the slot (10). The in-situ detection board is electrically connected to the single board in-situ detection component (11) and the dummy panel in-situ detection component (12). The in-situ detection board is configured to determine whether the slot (10) is in an empty state, a single board in-situ state, or a dummy panel in-situ state based on the level state of the single board in-situ detection component (11) and the level state of the dummy panel in-situ detection component (12).

2. The communication device according to claim 1, characterized in that, The in-situ detection board is electrically connected to the single-board in-situ detection component (11) and the dummy panel in-situ detection component (12) in the same slot (10) via the same in-situ detection signal line (200); The single board (3) can switch the single board in-situ detection device (11) from a first level state to a second level state by inserting it into the slot (10), and the dummy panel (4) can switch the dummy panel in-situ detection device (12) from a first level state to a third level state by inserting it into the slot (10). The in-situ detection board is configured as follows: In response to the presence detection signal line (200) being in the first level state, it is determined that the slot (10) is in an empty state; In response to the presence detection signal line (200) being in the second level state, it is determined that the slot (10) is in the board presence state; In response to the presence detection signal line (200) being in the third level state, it is determined that the slot (10) is in a dummy panel presence state.

3. The communication device according to claim 2, characterized in that, The in-situ detection board includes an in-situ detection circuit (21), and the communication device further includes a first signal output circuit (22), a second signal output circuit (32), and a third signal output circuit (23); The in-situ detection circuit (21) is electrically connected to the single-board in-situ detection device (11) and the dummy panel in-situ detection device (12) of the multiple slots (10) through multiple in-situ detection signal lines (200); There are multiple first signal output circuits (22), and each of the multiple first signal output circuits (22) is electrically connected to a multiple in-situ detection signal lines (200). The first signal output circuit (22) is used to make the in-situ detection signal lines (200) be in the first level state. The single board (3) is used to enable the single board in-situ detection device (11) to conduct the in-situ detection signal line (200) and the second signal output circuit (32), and the second signal output circuit (32) is used to enable the in-situ detection signal line (200) to be in the second level state; The dummy panel (4) is used to enable the dummy panel presence detection device (12) to conduct the presence detection signal line (200) and the third signal output circuit (23), and the third signal output circuit (23) is used to enable the presence detection signal line (200) to be in the third level state.

4. The communication device according to claim 3, characterized in that, The first signal output circuit (22) is a high-level signal output circuit, and one of the second signal output circuit (32) and the third signal output circuit (23) is a grounding circuit, while the other is a high-low level alternating signal output circuit; The first level state is a high level state, the second level state and the third level state are either a low level state or an alternating high and low level state.

5. The communication device according to claim 4, characterized in that, The second signal output circuit (32) is a grounding circuit, and the third signal output circuit (23) is a high-low level alternating signal output circuit; The second level state is a low level state, and the third level state is an alternating high and low level state.

6. The communication device according to claim 5, characterized in that, When the slot (10) is in an empty state, the high-low level alternating signal output circuit outputs a low level signal; The in-situ detection circuit (21) is configured as follows: In response to the in-situ detection signal line (200) switching from a high level state to a low level state, the high-low level alternating signal output circuit is controlled to output a high-low level alternating signal; In response to the presence detection signal line (200) being in a low-level state, it is determined that the slot (10) is in a single-board presence state; In response to the presence detection signal line (200) being in an alternating high and low level state, it is determined that the slot (10) is in a dummy panel presence state.

7. The communication device according to claim 6, characterized in that, The presence detection circuit (21) is also configured to control the high-low level alternating signal output circuit to output a low level signal after determining that the slot (10) is in a false panel presence state.

8. The communication device according to any one of claims 5-7, characterized in that, The in-situ detection board is the main control board (2), and the in-situ detection circuit (21), the high-level signal output circuit and the high-low level alternating signal output circuit are located on the main control board (2); The grounding circuit is located on the single board (3).

9. The communication device according to any one of claims 3-8, characterized in that, The dummy panel presence detection component (12) includes a first contact (121) and a second contact (122). The first contact (121) is connected to the presence detection signal line (200), and the second contact (122) is connected to the third signal output circuit (23). The dummy panel (4) is used to enable conduction between the first contact (121) and the second contact (122).

10. The communication device according to claim 1, characterized in that, The in-situ detection board is electrically connected to the single-board in-situ detection component (11) and the dummy panel in-situ detection component (12) via the first in-situ detection signal line (201) and the second in-situ detection signal line (202), respectively. The in-situ detection board is configured as follows: Based on the level state of the first in-situ detection signal line (201), it is determined whether the slot (10) is in a single-board in-situ state; Based on the level state of the second in-situ detection signal line (202), it is determined whether the slot (10) is in a false panel in-situ state.

11. The communication device according to claim 10, characterized in that, The single board (3) can switch the single board in-situ detection device (11) from a high level state to a low level state by inserting it into the slot (10), and the dummy panel (4) can switch the dummy panel in-situ detection device (12) from a high level state to a low level state by inserting it into the slot (10). The in-situ detection board is configured as follows: In response to both the first in-situ detection signal line (201) and the second in-situ detection signal line (202) being in a high-level state, it is determined that the slot (10) is in an empty state; In response to the first in-situ detection signal line (201) being in a low-level state, it is determined that the slot (10) is in a single-board in-situ state; In response to the second in-situ detection signal line (202) being in a low-level state, it is determined that the slot (10) is in a dummy panel in-situ state.

12. The communication device according to claim 11, characterized in that, The in-situ detection board includes an in-situ detection circuit, and the communication device further includes a plurality of first signal output circuits (22); The in-situ detection circuit (21) is electrically connected to the single-board in-situ detection device (11) of the multiple slots (10) through multiple first in-situ detection signal lines (201), and is electrically connected to the dummy panel in-situ detection device (12) of the multiple slots (10) through multiple second in-situ detection signal lines (202); Each of the first signal output circuits (22) is electrically connected to a first in-situ detection signal line (201) or a second in-situ detection signal line (202), and the first signal output circuit (22) is used to output a high-level signal; The single board (3) is used to ground the first in-situ detection signal line (201) by the single board in-situ detection device (11), and the dummy panel (4) is used to ground the second in-situ detection signal line (202) by the dummy panel in-situ detection device (12).

13. The communication device according to claim 12, characterized in that, The dummy panel presence detection component (12) includes a first contact (121) and a second contact (122), the first contact (121) being connected to the second presence detection signal line (202), and the second contact (122) being grounded; The dummy panel (4) is used to enable conduction between the first contact (121) and the second contact (122).

14. The communication device according to claim 9 or 13, characterized in that, The dummy panel (4) includes a jumper (41), the two ends of which are used to contact the first contact (121) and the second contact (122) respectively, so that the first contact (121) and the second contact (122) are connected through the jumper (41).

15. The communication device according to claim 14, characterized in that, The shorting member (41) is an elastic member, and the shorting member (41) can elastically extend and retract in the insertion and removal direction of the dummy panel (4).

16. The communication device according to claim 9 or 13, characterized in that, The dummy panel presence detection device (12) includes a switch, the switch including a first contact (121) and a second contact (122); The dummy panel (4) is used to contact the switch so that the first contact (121) and the second contact (122) are connected.

17. The communication device according to claims 1-16, characterized in that, The slot (10) is provided with a first connector, and one pin of the first connector forms the single board in-situ detection element (11); The single board (3) includes a second connector (31), which includes a grounding pin for connecting to the single board in-situ detection component (11).

18. The communication device according to any one of claims 1-17, characterized in that, The main body (1) of the device includes a back plate (100), and the back plate (100) is provided with the single panel in-situ detection component (11) and the dummy panel in-situ detection component (12).

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