# XRN-1620B2 # KVM # monitor/mouse control
1. Installation case
- Installed multiple cameras at manufacturing complex and registered those cameras to
the 4 of NVR(XRN-1620S)s for monitoring
2. Symptom
- When switching NVRs in SSM, some NVRs experience switching speed delay and displays
abnormally
- Mouse cursor disappears and NVR can not be controlled
3. Cause
- 4 NVRs are connected to KVM using HDMI connection, and the user controls all 4 NVRs via KVM
- KVM switch is not compatible with our products, and can not be used together
*KVM switch? “Keyboard, Video (monitor), Mouse.”
The main function of a KVM switch is to control, switch
between, and manage multiple PCs or servers via a single keyboard, monitor and mouse
4. Measures
- Remove KVM switches and set up individual connection to monitors for each NVR
- Pre-check compatibility between devices before installing on site
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