HIKVISION DS-2TD4136T-9 Quick Start Manual page 27

Thermal Network Speed dome·Quick Start Guide
 Examine if the IE plug-in is well installed. Change the Website
Blocker settings if necessary.
 For cross-domain routing, enable the UPnP of device, or set
manual mapping to port No. 80, 8000, or 554.
 Examine if the live view channel amount exceeds the upper
limit.
 Examine the network bandwidth.
Question:
Focus fails when you test outdoor device in indoor situation.
Answer:
 Restore the device to default settings.
 Adjust the Min. Focusing Distance in Configuration > Image>
Display Settings > Focus
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