DS-CAM-640c & DS-CAM-1100m
TECHNICAL REFERENCE MANUAL
6.9. Performance improvements
(e.g. in case of frames lost or buffer overrun)
A loss of a few frames during a measurement is normal, due to collisions on the Ethernet network.
Here are some useful hints to improve the performance:
● Do not operate the camera in a fully-loaded network (e.g. office computers). Just use a direct
connection or one switch (with no additional participants).
● Disable all anti-virus, firewall, indexing, and synchronization programs running in the
background.
● Verify that the PC has a Gigabit-Ethernet network card, not only 100Mbit/s.
○ Check this in Device Manager tools
● Verify that the LAN cable used between the camera and the PC is at least CAT5 quality. For longer
cable lengths CAT6 cable should be used for optimal performance.
● For this camera, the best quality can be achieved by using a powerful CPU.
● Try to decrease the JPEG compression (e.g. from 80 down to 50%)
● Use the Windows resource monitor (can be found in Task manager) to check for bottlenecks.
○ Check CPU and RAM
● For optimal performance, we recommend enabling “Jumbo” frames on your PC network card.
“Jumbo” frames are Ethernet packets larger than 1500 bytes. This way less CPU time is spent for
data reception, therefore, increasing performance and minimizing data loss.
Image 22. Jumbo packet settings
Windows 11 Settings → Network & internet → Advanced network settings → “Used Ethernet
card” → Properties → Configure → Advanced → Jumbo Packet → Set to highest value (e.g. 9kB
MTU)
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