Frequently Asked Questions - D-Link DCS-6620G Quick Installation Manual

Frequently Asked Questions

Q: What is an 802.11g PTZ Internet Camera?
A: The 802.11g PTZ Internet Camera is a stand-alone system connecting directly to an Ethernet, Fast
Ethernet, or wireless network. It differs from a conventional PC Camera, the 802.11g PTZ 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 802.11g PTZ 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 algorithm is used to compress the digital image?
A: The 802.11g PTZ Internet Camera utilizes MPEG-4 simple profile or MJPEG Mode image
compression technology providing high quality images. MJPEG is a standard for image compression and
can be applied to various web browser and application software without the need to install extra
software.
Q: Can the 802.11g PTZ Internet Camera be used outdoors?
A: The 802.11g PTZ Internet Camera is not weatherproof. It needs to be equipped with a weatherproof
case to be used outdoors and it is not recommended.
Q: When physically connecting the 802.11g PTZ Internet Camera to a network what network
cabling is required?
A: The 802.11g PTZ Internet Camera uses Category 5 UTP cable allowing 10 Base-T and 100 Base-T
networking.
Q: Can the 802.11g PTZ Internet Camera be connected to the network if it consists of only private
IP addresses?
A: The 802.11g PTZ Internet Camera can be connected to a LAN with private IP addresses.
Q: Can the 802.11g PTZ 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-6620G
uses 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. Please refer to page 28 for more information.
Q: Why am I unable to access the 802.11g PTZ Internet Camera from a web browser?
A: If a router or firewall is used on the network, the correct ports for the DCS-6620G may not be
configured on the router or firewall. To correct the problem, you need to determine if the DCS-6620G is
behind a router or firewall and if the router or firewall is properly configured for the ports the DCS-6620G
is using. Refer to page 28 for help in opening the correct ports on a router or firewall for use with the
DCS-6620G.
Q: Why does the 802.11g PTZ Internet Camera work locally but not remotely?
A1: This might be caused by network firewall protection. The firewall may need to have some settings
changed in order for the 802.11g PTZ Internet Camera to be accessible outside your local LAN. Check
with the Network Administrator for your network.
A2: Make sure that the 802.11g PTZ 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 802.11g PTZ Internet Camera to be accessed outside your local LAN. Please refer to
page 31 for more information.
Q: The images appear to be of poor quality, how can I improve the image quality?
A1: Make sure that your computer's display properties are set above 256 colors. 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 802.11g PTZ 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 50 and 51 for detailed information.
(For further troubleshooting, please refer to the User manual on the CD ROM)
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