HIKVISION DS-2TD2166 Quick Start Manual page 38

Examine if any obstruction is nearby, e.g. spider

web.
Question:
Live view fails with good network connection.
Answer:
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