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Page 46 / 57 Scroll up to view Page 41 - 45
46
D-Link DCS-930 User Manual
Section 4 - Security
Repeat the above steps adding the port 554 to both the Public and Private Port sections. A check mark appearing before the entry name
will indicate that the ports are enabled.
Important: Some ISPs block access to port 80 and other commonly used Internet ports to conserve bandwidth. Check with your ISP so
that you can open the appropriate ports accordingly. If your ISP does not pass traffic on port 80, you will need to change the port the
camera uses from 80 to something else, such as 800. Not all routers are the same, so refer to your user manual for specific instructions
on how to open ports.
Enter valid ports in the Virtual Server section of your router. Please make sure to check the box next to the camera name on the Virtual
Server List to enable your settings.
Page 47 / 57
47
D-Link DCS-930 User Manual
Section 5 - Troubleshooting
Troubleshooting
1. Why does the LED not light up?
The power supply might be faulty. Confirm that you are using the provided DC 5V power supply for this network camera. Verify that the
power supply is correctly connected. If the camera is functioning normally, the LED may have been disabled. See page 30 for information
about how to enable the LED.
2. Why is the camera’s network connection unreliable?
There might be a problem with the network cable. To confirm that the cables are working, PING the address of a known device on the
network. If the cabling is OK and your network is reachable, you should receive a reply similar to the following (…bytes = 32 time = 2 ms).
Another possible problem may be that the network device such as a hub or switch utilized by the Network Camera is not functioning
properly. Please confirm the power for the devices are well connected and functioning properly.
3. Why does the Network Camera work locally but not remotely?
This might be caused by the firewall protection. Check the Internet firewall with your system administrator. The firewall may need to have
some settings changed in order for the Network Camera to be accessible outside your local LAN. For more information, please refer to
the section about installing your camera behind a router.
Make sure that the Network Camera isn’t conflicting with any Web server you may have running on your network.
The default router setting might be a possible reason. Check that the configuration of the router settings allow the Network Camera to be
accessed outside your local LAN.
4. Why does a series of broad vertical white lines appear through out the image?
It could be that the CMOS sensor (a square panel situated behind the lens that measures the light signals and changes it into a digital
format so your computer can present it into an image that you are familiar with) has become overloaded when it has been exposed to
bright lights such as direct exposure to sunlight or halogen lights. Reposition the Network Camera into a more shaded area immediately
as prolonged exposure to bright lights will damage the CMOS sensor.
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D-Link DCS-930 User Manual
Section 5 - Troubleshooting
5. The camera is producing noisy images. How can I solve the problem?
The video images might be noisy if the Network Camera is used in a very low light environment.
6. The images are poor quality, how can I improve the image quality?
Make sure that your computer’s display properties are set to at least 6-bit color. Using 16 or 256 colors on your computer will produce
dithering artifacts in the image, making the image look as if it is of poor quality.
The configuration on the Network Camera image display is incorrect. The Web Configuration Video section of the Web management allows
you to adjust the related-parameters for improved images such as: brightness, contrast, hue and light frequency. Please refer to the Web
Configuration section for detailed information.
7. Why are no images available through the Web browser?
ActiveX might be disabled. If you are viewing the images from Internet Explorer make sure ActiveX has been enabled in the Internet Options
menu. You may also need to change the security settings on your browser to allow the ActiveX plug-in to be installed.
If you are using Internet Explorer with a version number lower than 6, then you will need to upgrade your Web browser software in order
to view the streaming video transmitted by the Network Camera.
Page 49 / 57
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D-Link DCS-930 User Manual
Appendix A - Wireless Basics
D-Link wireless products are based on industry standards to provide easy-to-use and compatible high-speed wireless* connectivity within
your home, business or public access wireless networks. Strictly adhering to the IEEE standard, the D-Link wireless family of products
will allow you to securely access the data you want, when and where you want it. You will be able to enjoy the freedom that wireless
networking delivers.
A wireless local area network (WLAN) is a cellular computer network that transmits and receives data with radio signals instead of wires.
Wireless LANs are used increasingly in both home and office environments, and public areas such as airports, coffee shops and universities.
Innovative ways to utilize WLAN technology are helping people to work and communicate more efficiently. Increased mobility and the
absence of cabling and other fixed infrastructure have proven to be beneficial for many users.
Under many circumstances, it may be desirable for mobile network devices to link to a conventional Ethernet LAN in order to use servers,
printers or an Internet connection supplied through the wired LAN.
A Wireless Router is a device used to provide this link.
Wireless Basics
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D-Link DCS-930 User Manual
Appendix A - Wireless Basics
What is Wireless?
Wireless or WiFi technology is another way of connecting your computer to the network without using wires. WiFi uses radio frequency to
connect wirelessly, so you have the freedom to connect computers anywhere in your home or office network.
Why D-Link Wireless
?
D-Link is the worldwide leader and award winning designer, developer, and manufacturer of networking products. D-Link delivers the
performance you need at a price you can afford. D-Link has all the products you need to build your network.
How does wireless work?
Wireless works similar to how cordless phone work, through radio signals to transmit data from one point A to point B. But wireless
technology has restrictions as to how you can access the network. You must be within the wireless network range area to be able to
connect your computer. There are two different types of wireless networks Wireless Local Area Network (WLAN), and Wireless Personal
Area Network (WPAN).
Wireless Local Area Network (WLAN)
In a wireless local area network, a device called an Access Point (AP) connects computers to the network. The access point has a small
antenna attached to it, which allows it to transmit data back and forth over radio signals. With an indoor access point as seen in the picture,
the signal can travel up to 300 feet. With an outdoor access point the signal can reach out up to 30 miles to serve places like manufacturing
plants, industrial locations, college and high school campuses, airports, golf courses, and many other outdoor venues.

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