Cisco Small Business VC220, Administration Manual

Page: 101 / 108

Troubleshooting
Questions and Answers
VC 220 Dome WDR Day/Night PoE Network Camera Administration Guide 101
A
Q. My video quality suddenly deteriorated.
This can happen when additional viewers connect to the camera,
overloading the camera or the available bandwidth. The image size and
quality can be adjusted to the required number of viewers and the available
bandwidth. Make these adjustments on
Camera Control > Video Settings,
page 57 .
Q. I don’t receive any emails when an event is detected.
It may be that the SMTP (Simple Mail Transport Protocol) server used by
the camera to send the e-mail will not accept mail. (This is to prevent Spam
from being sent to an SMTP server). Try using a different SMTP server, or
contact your ISP to see if SMTP access is being blocked.
You can also try a ping test to the SMTP server to see if it responds. While a
response doesn’t necessarily prove that your SMTP will accept email, it
does let you know if the server is up. Also note that if SSL Encryption is
active, on port 465, then the SMTP server must support SSL. Otherwise
don’t check SSL and configure your local mail server (such as your
Windows 2003/2008 mail server or Exchange mail server) to handle local
mail.
Q. When using the motion detection feature, I receive emails that don't
show any moving objects.
The motion detection feature may be too sensitive and can cause false
alarms (consider using PIR for thermal detection in some situations). Motion
detection compares frames to see if they are different. Major differences
between frames are assumed to be caused by moving objects.
If the sensitivity is set too high, motion detection can be triggered by
sudden changes in the level of available light or movement of the camera
itself. For example, twilight, like dusk and dawn, can cause false positive
detections. Motion detection should not be used if the camera is outdoors
because of the possibility of false positives. The motion detection feature
works best in locations where there is good steady illumination, and the
camera is mounted securely.
Q. The video image is blurry.
Try cleaning the dome, or adjusting the MPEG-4 or MJPEG image quality
setting found in
Camera Control > Video Settings, page 57 . Video created
with lower settings will contain less detail; this is the trade-off for using less
bandwidth. You should also manually adjust the focus and zoom. See
Adjusting the Lens, page 87 .