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121
Appendix
Frequently Asked Questions
Internet Camera Features
Q: What is an Internet Camera?
A:
The Internet Camera is a stand-alone system connecting directly to an
Ethernet or Fast Ethernet network. It
differs from a conventional PC Camera,
the Internet Camera is an all-in-one system with built-in CPU and Web-based
solutions providing a low cost solution that can transmit high quality video images
for monitoring. The Internet Camera can be managed remotely, accessed and
controlled from any PC/Notebook over an Intranet or the Internet from a Web
browser.
Q
:
What is the maximum number of users that can be allowed to access
DCS-2000 simultaneously?
A:
The maximum number of users that can log onto the Internet Camera at the
same time is 10. Please keep in mind the overall performance of the transmission
speed will slow down when many users are logged on.
Q
:
What algorithm is used to compress the digital image?
A:
The Internet Camera utilizes H.263+ MPEG-4 Short Header Mode image
compression technology to provide high quality images.
Q:
Can I capture still images from the Internet Camera?
A:
Yes you are able to capture still images with the snapshot function from
the software application CD supplied with the Internet Camera.
Internet Camera Installation
Q:
Can the Internet Camera be used outdoors?
A:
The Internet Camera is not weatherproof. It needs to be equipped with a
weatherproof case to be used outdoors and it is not recommended.
Q
:
What network cabling is required for the Internet Camera?
A:
The Internet Camera uses Category 5 UTP cable allowing 10 Base-T and
100 Base-T networking.
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122
Q:
Can the Internet Camera be setup as a PC-cam on a computer?
A:
No, the Internet Camera is used only on an Ethernet or Fast Ethernet network.
The D-Link DSB-C110, DSB-C310, can be used as a PC Camera (Webcam).
Q
:
Can the Internet Camera be connected on the network if it consists of
only private IP addresses?
A:
Yes, the Internet Camera can be connected to a LAN with private IP
addresses.
Q:
Can the Internet Camera be installed and work if a firewall exists on
the network?
A:
If a firewall exists on the network, port 80 is open for ordinary data
communication. The
DCS-2000
uses port 5001 for control and synchronization,
port 5002 for streaming audio and port 5003 for streaming video. These ports
(or the ports you specify from the
Advanced
Tab in the Configuration screen if
you change the default ports) need to be opened on the firewall.
Q
:
Why am I unable to access the Internet Camera from a Web browser?
A1:
The possible cause might be the IP Address for the Internet Camera is
already being used by another device. To correct the possible problem, you
need to first disconnect the Internet Camera from the network. Then run the
PING utility (follow the instructions in the
Appendix
- How to Ping Your IP
Address
.)
In Windows 95/98/2000, check that the IP Address of the Internet Camera is
within the same subnet as your workstation.
Click
Start
,
Setting
,
Control Panel
, and the
Network
icon.
Select TCP/IP from the
Network
dialog box and from the
TCP/IP Properties
dialog box click on
Specify an IP address
.
If the Internet Camera is situated on a different subnet than your workstation,
you will not be able to set the IP address from this workstation. To verify
make sure the first 3 sections of the IP address of the Internet Camera
corresponds to the first 3 sections of the workstation. Therefore the IP
address of the Internet Camera must be set from a workstation on the
same subnet.
A2:
Other possible problems might be due to the network cable. Try replacing
your network cable. Test the network interface of the product by connecting a
local computer to the unit, utilizing a standard Crossover Cable. If the problem is
not solved the Internet Camera might be faulty.
Frequently Asked Questions (continued)
Page 123 / 140
123
Q:
Why does the Internet Camera work locally but not externally?
A1:
Might be caused from the firewall protection. Check the Internet firewall
with your system administrator. The firewall may need to have some settings
changed in order for the Internet Camera to be accessible outside your local
LAN.
A2:
Make sure that the Internet Camera isn’t conflicting with any Web server
you may have running on your network.
A3:
The default router setting might be a possible reason. Check that the
configuration of the router settings allow the Internet Camera to be accessed
outside your local LAN.
Q:
Why does a series of broad vertical white lines appear throughout
the image?
A:
It could be that the CMOS sensor has become overloaded when it has been
exposed to bright lights such as direct exposure to sunlight or halogen lights.
Reposition the Internet Camera into a more shaded area immediately as prolonged
exposure to bright lights will damage the CMOS sensor.
Q: The focus on the Internet Camera is bad, how can I correct it?
A1:
Adjust the Internet Camera focus manually as described in “Adjusting the
Internet Camera Focus” in the Appendix section of this manual (page 130).
Frequently Asked Questions (continued)
Q: I connected the Internet Camera directly to a computer with a cross-
over cable Ethernet cable and received the following Windows error upon
running Installation Wizard:
A1:
This Windows error will occur if the Internet Camera is connected to a
computer that is not properly configured with a valid IP address.
Turn off DHCP
from the Network Settings in Windows and configure the computer with a valid
IP address or connect the camera to a router with DHCP enabled.
A2:
This error can also occur if the
Installation Wizard
icon is clicked on more
than once from the setup wizard.
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124
Q:
The images are of poor quality, how can I improve the image quality?
A1:
Make sure that your computer’s display properties are set to at least 15-bit
color. Using 16 or 256 colors on your computer will produce dithering artifacts in
the image, making the image appear to be of poor quality.
A2:
The configuration on the Internet Camera image display is incorrect. Through
the
Advanced > Image Setting
section of the Web management you need to
adjust the image related parameters
such as brightness, contrast, hue and
power line frequency for fluorescent light . Please refer to the
Advanced >
Image Setting
section on Page 46 for detailed information.
How to PING Your IP Address
The PING (Packet Internet Groper) command can determine whether a specific
IP address is accessible by sending a packet to the specific address and waiting
for a reply. It can also provide a very useful tool to confirm if the IP address
conflicts with Internet Camera over the network.
Follow the step-by-step procedure below to utilize the PING command but first
you must disconnect Internet Camera from the network.
Start a DOS window.
Type ping x.x.x.x, where x.x.x.x is the IP address of the Internet Camera.
The replies, as illustrated below, will provide an explanation to the
problem.
Frequently Asked Questions (continued)
Q:
Noisy images occur. How can I solve the problem?
A1:
The video images might be noisy if the
DCS-2000
is used in a very low light
environment. To solve this issue you need more lighting.
Page 125 / 140
125
There is a button hidden in the pinhole beside the Ethernet socket. It is
used to
reset
the system or
restore
the factory default settings. Sometimes
resetting the
DCS-2000
will return the system back to a normal state. If
the system still has problems after reset, restore the factory settings and
install again:
RESET
:
1.
3.
RESTORE
:
1.
2.
3.
Reset and Restore
Reset button
Restoring the factory defaults will result in the
loss of any previous settings and will require
running the Installation Wizard to return the
DCS-2000
to user preferred settings.
2. The LED on the front of the camera will begin blinking
red and green fast.
Lightly insert a paper clip (or a similar sized tool) into the
reset hole on the back of the camera, press lightly and
then release the button.
Insert the paperclip or other tool and press and continuously
hold down on the button recessed inside the reset hole.
Wait for the LED on the front of the camera to blink red
and green and hold the button through two cycles of
blinking (about 5-7 seconds.)
Withdraw the tool after the second cycle of the LED
blinking and a factory restore has been completed.
When the LED stops the blinking fast and starts to blink
once a second, the reset is completed.

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