LDU

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Change the GUI language.

   The LDU supports two languages: English and Chinese.

Context

By default, the LDU will log you out if you do not perform any keyboard or mouse operations within 5 minutes.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Set Session Timeout (mins) to Never and click Save.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Set Session Timeout (mins) based on the site requirements.
5. Select Live/Playback Page Lock Time.
   Table 6-26 describes the processing mechanisms in different scenarios.

   Table 6-26 Scenario description

   Scenario	Processing Mechanism
   No operation on the live video viewing or recording playback page for a specified period of time	The Live/Playback Page Lock Time parameter is selected: If no operation is performed within the specified period, the system automatically locks the screen, but the live video viewing or recording playback continues. You can click any area on the GUI and enter the login password to unlock the screen. The Live/Playback Page Lock Time parameter is not selected: If no operation is performed within the specified period, the system automatically redirects you to the login page.
   No operation on other pages for a specified period of time.	No matter the Live/Playback Page Lock Time is selected or not, the system automatically redirects you to the login page if no operation is performed within the specified period.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Change the maximum number of favorited layouts.

   The LDU supports 0 to 16 favorited layouts.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Change the pointer movement speed.

   Drag to adjust the pointer movement speed.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > General.
4. Configure camera go-online and go-offline alarm emails, as shown in Figure 6-66.
   Figure 6-66 Configuring camera go-online and go-offline alarm emails
   

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System > System Configuration > Network.
4. Change the device IP address based on the actual address mode. After the IP address is changed, the system will automatically restart some modules, which takes 2 minutes.

Scenario Description

If the IP address of the computer running the northbound device (for example, the iClient S100) and the IP address of the northbound network adapter are in different network segments, and the IP addresses of the southbound device (for example, a camera) and southbound network adapter are also in different network segments, you are advised to set the default route to the northbound network adapter and specify a route network segment.

Configuring a Specified Route Network Segment

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System > System Settings > Network.
4. Configure a specified network segment, as shown in Figure 6-67.
   Figure 6-67 Configuring a specified network segment
   

   Table 6-27 describes the parameters.

   Table 6-27 Parameter description

   Parameter	Description
   Set GE1 as Default Route	The rules for setting the default route vary depending on whether the IP address of the computer running the northbound device (for example, the iClient S100) and the IP address of the northbound network adapter are in the same network segment. They are in the same network segment. If the IP addresses of the southbound device (for example, a camera) and southbound network adapter are in the same network segment, set the default route to the southbound or northbound network adapter. If the IP addresses of the southbound device (for example, a camera) and southbound network adapter are in different network segments, set the default route to the southbound network adapter. They are in different network segments. If the IP addresses of the southbound device (for example, a camera) and southbound network adapter are in the same network segment, set the default route to the northbound network adapter. If the IP addresses of the southbound device (for example, a camera) and southbound network adapter are in different network segments, you are advised to set the default route to the northbound network adapter. In this case, you also need to set Routing Network Segment.
   Set GE2 as Default Route
   Routing Network Segment	Network segment to which the southbound device belongs. If there are multiple network segments, separate them with semicolons (;). If the iClient S100 and VMS are connected through the southbound network, you also need to add the network segments to which the iClient S100 and VMS belong.
   Enable IPv6	Indicates whether to enable IPv6. By default, this parameter is deselected. NOTE: IPv6 does not support TLS encryption. The RESTful interface for server recording playback does not support IPv6. IPv6 does not support NAT networking. Only IPv6 cameras connected through ONVIF are supported. You can request streams from such cameras. Cameras that comply with other protocols, such as HWSDK and GB/T 28181, cannot be connected. If the HWT-IVS1800 is connected to the upper-level video and image management platform through GB/T 28181-2016, the HWT-IVS1800 does not support both IPv4 and IPv6 addresses.
   Northbound service IPv6 address/Southbound IPv6 service address	Network information of the northbound or southbound service. Set these parameters based on the site requirements. NOTE: The service IP address and gateway IP address must be in the same network segment. Changing the IP address will interrupt services. Exercise caution when performing this operation. The restart takes about 1 to 2 minutes.
   Northbound subnet prefix/Southbound Subnet Prefix
   IPv6 address of the northbound gateway/Southbound IPv6 gateway address
   IPv6 specified route network segment	Information about the IPv6 network segment where the northbound device is located. If multiple network segments are involved, separate them with semicolons (;) and do not end with a semicolon (;). A maximum of 13 network segments can be configured, and a maximum of 200 characters are supported.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Time.
4. Configure NTP time synchronization, as shown in Figure 6-68.
   

   The function of synchronizing system time with the cloud service system and the function of synchronizing system time with the NTP server cannot be enabled at the same time.

   Figure 6-68 Configuring NTP time synchronization
   

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Time.
4. Set Time calibration mode to Manual time calibration and configure the system time, as shown in Figure 6-69.
   Figure 6-69 Manual time calibration
   

   How Do I Manually Configure the System Time? describes the parameters.

   Table 6-28 Parameters/Buttons for manual time configuration

   Parameter/Button	Description
   Time Zone	Current time zone of the device.
   Date and Time	Date and time of the device.
   Sync Time to Camera	Indicates whether to synchronize time to the camera connected to the device. If this function is enabled, the camera will time-synchronize with the server. The function takes effect only after the SCU module is restarted.
   DST	Indicates whether to enable DST. If DST is used locally, toggle on this parameter. After DST is configured, the time zone cannot be changed. Therefore, set the time zone before setting DST. If you need to change the time zone after setting DST, disable DST first.
   Week	DST mode.
   Date
   Start Time	Start time of DST.
   End Time	End time of DST.
   Offset Time	Offset time of DST.
   Save	Button for saving settings.
   Cancel	Button for restoring data to the state last saved.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Account and Password > Password Change.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Account and Password > Validity Period.
4. Select Enable Validity and set Password Validity Period (Days).

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Account Password > Password Recovery.
4. Set password recovery parameters, as shown in Figure 6-72.
   Figure 6-72 Setting password recovery parameters
   

   Table 6-30 describes the parameters.

   Table 6-30 Parameter description

   Parameter	Operation	Description
   Scan QR code using HoloSens app	Set mobile number	You can toggle on Scan QR code using HoloSens app and change the mobile number in the Mobile Number text box. If you toggle off Scan QR code using HoloSens app, the mobile number cannot be changed.
   Security question	Set security question	You can toggle on Security question and change the security questions and answers. If you toggle off Security question, the security questions and answers cannot be changed. NOTE: You can select preset questions or customize questions. A customized question must contain 1 to 80 bytes and cannot contain the following special characters: ~ ` ! ^ = { } | \ [ ] < > ' For customized questions, their answers (excluding the space at the beginning) must contain 2 to 128 bytes. You need to set three security questions and their answers. All the security questions and their answers must be unique.
   Apply	-	After the preceding parameters are set, the system automatically verifies the validity of the settings. If the verification is successful, you can click Apply to apply the settings. After you click Apply, the settings take effect only after the admin account passes authentication.
   Cancel	-	You can click Cancel to cancel the preceding settings.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Account and Password > Validity Period.
4. Deselect Enable Validity.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Camera List.
4. Change the password for connecting a camera, as shown in Figure 6-73.
   Figure 6-73 Changing the password for connecting a camera
   

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Information.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Camera List.
4. Toggle on Direct Connection Preferred, as shown in Figure 6-74.
   Figure 6-74 Toggling on Direct Connection Preferred
   
   • In direct connection mode, the system directly obtains video streams from a camera and plays the video. Direct connection does not occupy the forwarding bandwidth of servers but has high requirements on the network quality.
   • The Direct Connection Preferred parameter is toggled off by default. You can set this parameter based on the site requirements.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management.
4. Choose Alarm > Alarm Information.
5. Select the camera to be configured from the camera list.
6. Click below Whether to deploy alarms and select Yes to enable alert deployment.
   • The default value is No. Set this parameter based on the site requirements.
   • Alarm information on a camera can be uploaded to the system only after alert deployment is enabled.

Change the Camera IP Address

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Network.
4. Select the camera to be configured, change the IP address and port number of the camera, and click Save, as shown in Figure 6-75.
   Figure 6-75 Changing the camera IP address
   

Change the Camera Time

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Time.
4. Select the camera to be configured, change the time zone of the camera, and click Save, as shown in Figure 6-76.
   Figure 6-76 Changing the time zone
   

5. (Optional) Click Apply to other, select cameras to which the current camera's time zone is to be copied, and click OK.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Audio.
4. Select the camera whose audio settings need to be modified, modify the parameters as needed, and click Save, as shown in Figure 6-77.
   Figure 6-77 Audio settings
   

5. (Optional) Click Apply to other, select cameras to be configured, and click OK to apply the modified parameters to the selected cameras in batches.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management.
4. Choose Video > Image.
5. Configure the brightness, contrast, sharpness, and saturation for a camera, as shown in Figure 6-78.
6. Click Save.
   Figure 6-78 Image settings
   

Context

You can draw an area on the video image and enable privacy mask. Unauthorized users cannot view the privacy mask area.

Prerequisites

You have rotated a camera to the specified position (to observe an area for which privacy mask needs to be enabled). For details, see Feature Configuration.

The privacy mask function is not supported during PTZ device rotation and lens zooming.

Configuring Live/Recorded Video Privacy Mask

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Video > Privacy Mask.
4. Select the camera to be configured.
5. Configure privacy mask, as shown in Figure 6-80.
   Figure 6-80 Configuring privacy mask
   
   

   • The minimum length of a selected area is 50 pixels by default, and the total length is 480 pixels. If the distance from the start position of a privacy mask area to the right border of the video image is less than the minimum length, the area cannot be drawn.
   • After privacy mask is enabled, users cannot view live video in the privacy mask area. The privacy mask area is fixed. It will not change if you rotate the camera through PTZ control but may change when you move the camera.

Configuring Live Video Privacy Mask

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose System Management > System Settings > Privacy Mask.
4. Configure a privacy mask area, as shown in Figure 6-81.
   Figure 6-81 Configuring a privacy mask area
   

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper right corner of the page.
3. Select Log Out.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper right corner of the page.
3. Select Restart.

Symptom

A blank screen occurs when a user attempts to view live video from a camera on the LDU.

Possible Causes

Media security has been enabled for the camera.

Solution

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Click in the upper left corner to access the main menu.
3. Choose Camera Management > Video > Extension Settings.
4. Select the camera to be configured from the camera list.
5. Toggle off Media Security and click Save, as shown in Figure 6-82.
   Figure 6-82 Disabling media security
   

Procedure

1. Check whether the network connection between the HWT-IVS1800 and the camera is normal by referring to How Do I Check Whether the HWT-IVS1800 Is Properly Connected to the Target Network Environment?.
   • If not, rectify the network fault.
   • If so, go to the next step.

2. Check whether the parameter settings (for example, IP address, port number, vendor, and model) in the camera web system are the same as those on the LDU.
   1. Log in to the LDU as the admin user. ( Logging In to the LDU)
   2. Click in the upper left corner to access the main menu.
   3. Choose Camera Management > Camera List.
   4. Select the camera to be configured and view basic information about the camera.
      Figure 6-83 Viewing basic information
      
   5. Ensure that the values of Vendor and Device Version on the LDU are the same as those in the camera web system.
   6. Choose Camera Management > Network.
   7. Ensure that the values of Camera IP Address and Device Login Port on the LDU are the same as those in the camera web system.
   8. Check whether the camera goes online.
      • If so, no further action is required.
      • If not, go to the next step.

3. Ensure that the registration user name and password in the camera web system are the same as those on the LDU.
   1. Change the registration user name and password in the camera web system.
      1. Log in to the camera web system as the admin user. ( Logging in to the Camera Web System)
      2. Change the registration user name and password.
   2. Change the registration user name and password on the LDU.
      1. Log in to the LDU as the admin user. ( Logging In to the LDU)
      2. Choose Camera Management > Camera List.
      3. Change the registration user name and password to be the same as those in the camera web system.
   3. Check whether the camera goes online.
      • If so, no further action is required.
      • If not, go to the next step.

4. Collect DCG logs and contact the device vendor.

   For details about how to collect DCG logs, see Collecting Run Logs.

Question

Why does a camera rotate to another position after I set a home position?

Answer

After you set the home position, another user may reset the home position. As a result, the home position information changes.

When different users set home positions in sequence, the system saves the home position information sets by the last user.

Question

I have set a home position for a camera. However, the home position button becomes unavailable after I exited the client and logged in to it again. What can I do?

Answer

After you set the home position, another user may disable the home position. As a result, the home position button becomes unavailable.

You can view the operation logs to check which user has disabled the home position.

Symptom

When I log in to the LDU, the message "Network error. Check client and server networks." is displayed, as shown in Figure 6-84.

Figure 6-84 Error message displayed during login to the LDU

Possible Causes

• The network process of the device is not started properly.
• The IP address of the device conflicts with the current network environment.

Solution

1. Remove the network cable from the network port of the device to ensure that the device is disconnected from the current network environment.
2. Power off the device. After the device stops running, power on the device.
3. Change the IP address of the device to one that does not conflict with the current network environment.

   For details about how to change the IP address of the device, see How Do I Modify the IP address of the System?.

Procedure (Security Question-based Authentication)

1. Log in as the admin user and click Forgot Password. The Security Question page is displayed, as shown in Figure 6-85.
   Figure 6-85 Security Question page
   

   Enter the correct answers to the preset security questions and click OK.

2. Reset the password, as shown in Figure 6-86.
   Figure 6-86 Password resetting page
   

   Enter a new password and confirm the password. You are advised to use a password with high complexity. For details, see Suggestions on Password Maintenance.

   After the new password is set successfully, use it to log in to the system.

Symptom

After the IVS1800 is restarted, the LDU GUI cannot be displayed on the MAXHUB.

Solution

If the IVS1800 whose video source has been connected to the MAXHUB is restarted, the input source may not be automatically switched. In this case, you need to manually switch the input source.

Context

In scenarios where a large amount of video and image data needs to be stored or the uplink bandwidth is limited, you can configure SuperCoding for cameras to save the storage capacity and uplink bandwidth occupied by live video viewing without degrading video image quality.

Application Limitations

• This function applies only to cameras connected through the HWSDK protocol.
• Only cameras of version 11.0 or later and that support SuperCoding are supported.
• SuperCoding is not supported for live or recorded video from 1 + N cameras.

Application Scenarios

• The uplink bandwidth of the site is less than the total uplink bandwidth required by the camera.
• The storage capacity of the site is greater than the storage capacity supported by the current disk.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU) Right-click a camera and choose Camera Management > Video > Video Encoding.
2. Set video encoding parameters of the camera on the LDU, as shown in Figure 6-87.
   Figure 6-87 Setting video encoding parameters
   

3. (Optional) Click Apply to other to apply the configuration to other cameras in batches.

Symptom

When the device is running, insert a USB flash drive (in NTFS or exFAT format) and download recordings on the LDU. The inserted USB flash drive is not displayed in the drive list, or there is no response after the user selects the USB flash drive and clicks the download icon.

Possible Causes

The built-in partitions of the USB flash drive affect the mount directory of the underlying driver.

Prerequisites

You have backed up important data in the USB flash drive, because deleting partitions may cause data loss.

Solution

1. Format the USB flash drive.
   1. Insert the USB flash drive into a computer running the Windows operating system.
   2. Open File Explorer, right-click the USB flash drive, and choose Format from the shortcut menu.
   3. In the File system drop-down list, select NTFS or exFAT.
   4. Click Start.

2. Delete the partitions on the USB flash drive.
   1. Right-click the This PC (Windows 10/11) or My Computer (Windows 7/8) icon.
   2. Choose Manage from the shortcut menu. In the window that is displayed, choose Disk Management in the navigation pane on the left.
   3. In the Disk Management window, find the disk corresponding to the USB flash drive.

      Generally, the disk property of the USB flash drive is displayed as Removable or Unallocated.

   4. Right-click the disk corresponding to the USB flash drive and choose Delete Volume from the shortcut menu to delete all partitions on the USB flash drive and restore the partitions to unallocated space.
   5. In the confirm dialog box that is displayed, click Yes.

3. Create a volume.
   1. Right-click the unallocated space and choose New Simple Volume from the shortcut menu. Set Allocation unit size to Default, as shown in Figure 6-88.
      Figure 6-88 Setting Allocation unit size to Default
      
   2. After the preceding operation is complete, the volume is created and the USB flash drive does not have any partitions.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Right-click on the desktop and choose Camera Management > Camera List.
3. Click Export. On the Camera export page that is displayed, edit the template name, select the export path, and click Export to download the template file to the local computer, as shown in Figure 6-89.
   Figure 6-89 Exporting the template file
   

4. Fill in the template file.
   Open the template file downloaded to the local computer, and enter the camera password.

   

   • For cameras connected through GB/T 28181, you need to enter the user name.

5. Import the template file, as shown in Figure 6-90.
   Figure 6-90 Camera information list
   
   1. Click Import. On the page that is displayed, click and import the prepared template file from the local computer.
      

      The template file to be uploaded must be in CSV format, and the file size cannot exceed 10 MB.

   2. Click verification to verify the camera information in the template file.
      • If all camera information passes the verification, the list of cameras imported is displayed. Then, go to c.
      • If any camera information fails to pass the verification, the list of failed cameras is displayed. You can modify the template file according to the verification failure cause and import the template file again.
   3. Click Import to add cameras in batches.

Procedure

1. Log in to the LDU as the admin user. ( Logging In to the LDU)
2. Export the template file, as shown in Figure 6-91.
   Figure 6-91 Exporting the template file
   
   1. Choose System Management > System Settings > Advanced.
   2. Click Export and save the configuration template file in .csv format to the local computer.

3. Import the template file.
   1. Modify the configuration file following instructions in the table header of the template file.
   2. Click Import. On the page that is displayed, click and import the prepared template file from the local computer.
      

      The template file to be uploaded must be in CSV format, and the file size cannot exceed 10 MB.

   3. Click verification to verify the advanced configuration information in the template file. If any advanced configuration information already exists, the verification fails.
      • If all information passes the verification, the advanced configuration information list is displayed. Then, go to d.
      • If any information fails to pass the verification, the list of failed advanced configuration information is displayed. You can modify the template file according to the verification failure cause and import the template file again.
   4. Click Import. On the page that is displayed, click OK to import the advanced configuration information, as shown in Figure 6-92.
      Figure 6-92 Importing the template file
      
      

      Some service modules need to be restarted after advanced configuration information is imported.

Prerequisites

You have obtained the camera upgrade package from the official website of related products, and saved the package to a USB flash drive.

Procedure

1. Insert the USB flash drive into the IVS1800.
2. Log in to the LDU as the admin user. ( Logging In to the LDU)
3. Choose Configuration > Camera Maintenance > Camera Upgrade.
4. Upgrade the camera.
   1. Select the installation package.
      

      The path to the installation package can contain a maximum of 255 characters.

   2. Select the required installation package type.

      Upgrade the basic package and then the algorithm package.

   3. Confirm the upgrade file and click Upgrade.
      

      The upgrade takes about 2 to 3 minutes.

      During the upgrade, do not power off the IVS1800 or camera or remove the USB flash drive from the IVS1800. Otherwise, the camera program may be damaged and cannot be started again.

Context

The decoding resources of the HWT-IVS1800 are limited. The number of resources required by a camera that is pulling streams varies depending on the resolution of the camera. When the number of remaining resources is insufficient, a message is displayed in the lower right corner, indicating that decoding exceeded the maximum specification.

The following table lists the number of decoding resources required for each resolution.

Symptom

The HWT-IVS1800 fails to pull streams due to an unstable network. After the network recovers, if too many streams are pulled at the same time, a blank screen occurs in some live video panes, and an error message is displayed in the lower right corner of the page, indicating that decoding exceeded the maximum specification.

Solution

1. Switch the primary or secondary stream.

   If the primary stream is played, switch to a secondary stream, which has a lower resolution. If a secondary stream is played, or decoding still exceeds the maximum specification after you switch the stream, go to Step 2 or Step 3 as required.

2. Change the resolution of the camera.
   1. Log in to the LDU as the admin user. ( Logging In to the LDU)
   2. Click in the upper left corner to access the main menu.
   3. Choose Camera Management > Video > Video Encoding.
   4. Select a desired camera, and set Resolution to a smaller value on the Main Stream tab page (and then the Sub Stream1 tab page if required).
   5. Click Save.

3. Close other streams to free up decoding resources.

   Close the live video pane where the blank screen occurred. Close one or more live video panes where streams are properly played. Select the camera that exceeded the decoding specifications to play the stream from the camera again.

Symptom

When you query historical alarms generated one week ago or earlier by cameras on the LDU, there is a possibility that the query fails, as shown in Figure 6-93.

Figure 6-93 Query failed

Possible Causes

The volume of historical alarm data is too large. When you query historical alarms based on filter criteria, the data volume is too large, and the query takes 60 to 80 seconds, which exceeds the timeout interval specified for the query interface.

Solution

1. If the first query fails, wait for 2 to 3 minutes and then perform the query again under the same search criteria, as shown in Figure 6-94.
   Figure 6-94 Querying alarms after waiting for a period of time
   

2. Narrow down the alarm query scope and perform the query again, as shown in Figure 6-95.
   Figure 6-95 Querying alarms after narrowing down the scope