VTech IS7121_-2-22 Manual - Manual (Page 100)

Appendix
95
Troubleshooting
The captured image or video streaming is too bright or too dark.
If the image is too bright, it may be caused by sunlight reflection. Avoid mounting
the doorbell to where it is exposed to direct sunlight or reflections caused
by sunlight.
If the image is too dark, make sure the location where the doorbell is installed has
enough exposure to light. If you would like to use the built-in infrared feature for
enhanced brightness, make sure the surroundings is dark enough for this feature
to be used.
During video streaming, press
ISO followed by + or - to adjust the brightness level.
If the previous suggestions do not work, find another location to install the doorbell.
Refer to Locating the doorbell on pages 10-13 in this user’s manual.
I can hear only audio but see no video when I try to perform the
video streaming.
When two handsets in the telephone system are in use for a call, you can only
perform audio streaming with the doorbell using other handset(s). To allow video
streaming to take place, end the call on either handset or both handsets.
When the handset chimes and I try to answer, it shows Not available at
this time.
Make sure no handset is using intercom.
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