TANDBERG Speaker D12809 User Manual

TANDBERG and Wireless LANs  
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TANDBERG  
D12809, Rev 1.0  
This document is not to be reproduced in whole or in  
part without the permission in writing from:  
TANDBERG  
 
TANDBERG  
TANDBERG and Wireless LANs  
1. Overview Of Wireless Standards  
1.1 802.11 Wireless Ethernet  
Ethernet was pioneered by Xerox in the 1970’s and was in fact a registered trademark of  
Xerox Corporation. After further development, the technology was improved and became  
known as Ethernet II. Xerox, with the help from Digital and Intel began establishing and  
publishing the standards. Realizing the international community would not recognize the  
standard, IEEE was charged with formalizing the standard along with other LAN  
technologies. The 802 committee was assembled to investigate Ethernet, Token Ring, Fiber  
Optic, and other LAN technology.  
1.1.1 802.11a  
The 802.11a specification applies to wireless ATM systems and is primarily used in access  
hubs. This specification operates at 5GHz and 6GHz. By using a modulation scheme of  
orthogonal frequency division multiplexing (OFDM), 802.11a can achieve speeds up to  
54Mbps. However, speeds of 6Mbps, 12Mbps and 24Mbps are more common.  
1.1.2 802.11b  
The 802.11b specification, also known as Wi-Fi, uses complementary code keying (CCK)  
phase-shift keying (PSK) instead of the traditional phase-shift keying (PSK) used in 802.11.  
The use of CCK allows for higher data speeds and less interference to multipath-propagation  
interference. 802.11b operates at 2.4GHz and allows for speeds up to 11Mbps.  
1.1.3 802.11g  
The 802.11g specification allows for speeds up to 54Mbps over short distances. The  
802.11g standard also operates at 2.4GHz and is compatible with 802.11b.  
1.2 BlueTooth  
BlueTooth is another wireless standard named for the 10th Century Viking king Harald  
Blåtand of Denmark. The Bluetooth wireless specification defines a low-power, low-cost  
technology that provides a standardized platform for eliminating cables between mobile  
devices and facilitating connections between products. Bluetooth operates at the unlicensed  
2.4GHz frequency. The standard uses a spread spectrum, frequency hopping, full-duplex  
signal at up to 1600 hops/sec. The signal hops among 79 frequencies at 1 MHz intervals to  
give a high degree of interference immunity.  
 
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TANDBERG and Wireless LANs  
2. TANDBERG’s Implementation  
TANDBERG has implemented the 802.11b standard into the  
TANDBERG 1000 product, using a standard PC card, to deliver  
768kbps of exceptional video and audio quality. This feature allows  
for ‘hot desk’ applications where a video conferencing unit may be  
shared from desk to desk without the need for expensive Ethernet  
cabling.  
2.1 Supported PC Cards  
TANDBERG continues to develop drivers for different wireless cards  
based upon market requests and availability of the PC cards. Currently, TANDBERG  
supports the following PC cards for 802.11b based on their global availability and popularity  
among the wireless community. While it is possible through the 802.11b standard to mix  
wireless network interface cards (NIC) and access point vendors, TANDBERG  
recommends using the same vendor for both to minimize any possible interoperability  
problems.  
B3.3 (and later)  
B4 (and later)  
v
v
v
v
v
v
v
Compaq WL110  
Lucent Orinoco Silver  
Lucent Orinoco Gold  
Cisco Aironet 350  
2.2 Features and Menu Settings  
The following features are available through the user interface for set up.  
2.2.1 SSID (Service Set Identification)  
Requirement: Mandatory  
The SSID, also known as ESSID (extended SSID), is the network name or network ID on  
which the particular unit will operate. This is very similar in comparison to a NT domain and  
can be comprised of text and/or numbers. It is important to use the same SSID as the  
access point. If the SSID in the TANDBERG unit is incorrect (this includes case sensitive  
mistakes) the unit will not be able to communicate with the access point. The SSID is a case  
sensitive label.  
2.2.2 Community  
Requirement: Optional  
 
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TANDBERG and Wireless LANs  
The Community name, also known as Nickname, can be used to attach a TANDBERG unit  
to a specific access point when all access points share the same SSID. The feature is not  
required to function properly.  
 
TANDBERG  
TANDBERG and Wireless LANs  
2.2.3 Mode  
Requirement: Mandatory  
The mode setting allows for two different modes of operation.  
Also known as peer to peer and IBSS Ad Hoc. This mode is used when  
Adhoc:  
communication is required between two units and an access point is not available.  
Additionally , if there is no need to communicate with a wired unit on a standard LAN, you  
can use this option. This is similar to a ‘back to back’ Ethernet cable used to connect two IP  
enabled devices without a LAN.  
Also known as Infrastructure, Base Station, or Access Point. When using an  
Managed:  
access point to connect a wired LAN to a wireless LAN. This is the most popular  
application. If this mode is used, the SSID in the TANDBERG unit must match the SSID in  
the access point.  
2.2.4 Security – Encryption  
The TANDBERG wireless 802.11b feature also supports Wired Equivalent Privacy (WEP)  
with the choice of 64-bit, 128-bit, or no encryption. This feature allows the wireless network  
to prevent an unauthorized person from using the network resources. It is important to  
remember that the encryption keys in the access point and in the TANDBERG unit must  
match. If the encryption keys do not match, and the SSID is correct, you will get an IP  
address but will not be able to transmit video and audio.  
The encryption keys can be entered as a hexadecimal or as ASCII using a ‘*’ prefix.  
Example:  
Deffe57563dee  
*secretkey  
hexadecimal  
ASCII  
The 64-bit key can be 10 hexadecimals or ‘*’ + 5 ASCII characters. The 128-bit keys can  
be 26 hexadecimals or ‘*’ + 13 ASCII characters.  
Additional security is offered in some access points by requiring the MAC addresses of the  
802.11b NIC cards to be registered in the access point. Only units with the MAC  
addresses can use the access point.  
3. Applications  
3.1 Why Wireless?  
The IP network is becoming a viable network for video conferencing. Now that more  
companies are beginning to switch to IP for their video conferencing needs, alternate  
methods of transmission are becoming necessary. The use of wireless 802.11b is allowing  
 
TANDBERG  
TANDBERG and Wireless LANs  
the rollout of videoconferencing to be seamless and quick. Wireless LANs offer the  
following productivity, convenience, and cost advantages over traditional wired networks:  
: Wireless LAN systems can provide video users with the ability to make  
Mobility  
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video calls anywhere in their organization regardless if they have an Ethernet  
connection in the room. This mobility supports productivity and service opportunities  
not possible with wired networks.  
: Installing a wireless LAN system can be fast  
Installation Speed and Simplicity  
and easy and can eliminate the need to pull cable through walls and ceilings. This is  
the concept behind ‘hot desking’.  
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: Wireless technology allows the network to go where wire  
Installation Flexibility  
cannot go and allows the user to be more creative in deploying their video  
conferencing needs.  
: While the initial investment required for wireless  
Reduced Cost-of-Ownership  
LAN hardware can be higher than the cost of wired LAN hardware, overall  
installation expenses and life-cycle costs can be significantly lower. Long-term cost  
benefits are greatest in dynamic environments requiring frequent moves and changes.  
: Wireless LAN systems can be configured in a variety of topologies to  
Scalability  
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meet the needs of specific applications and installations. Configurations are easily  
changed and range from peer-to-peer networks suitable for a small number of users  
to full infrastructure networks of thousands of users that enable roaming over a broad  
area.  
How Wireless LANs Are Used in the Real World  
Wireless LANs frequently augment rather than replace wired LAN networks—often  
providing the final few meters of connectivity between a wired network and the mobile user.  
The following list describes some of the many applications made possible through the power  
and flexibility of wireless LANs:  
Doctors and nurses can use video in any room and not be limited to only using the  
room with the system.  
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Network managers in dynamic environments minimize the overhead caused by  
moves, extensions to networks, and other changes with wireless LANs.  
Training sites at corporations and students at universities use wireless connectivity to  
minimize the cables to the desktop  
Network managers installing networked computers in older buildings find that  
wireless LANs are a cost-effective network infrastructure solution.  
Trade show and branch office workers minimize setup requirements by installing pre-  
configured wireless LANs needing no local MIS support.  
 
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TANDBERG and Wireless LANs  
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Network managers implement wireless LANs to provide backup for mission-critical  
applications running on wired networks.  
4. Glossary  
Adhoc – A mode used to allow two 802.11b units to communicate without the use of an  
access point.  
ESSID – Extended SSID. See SSID.  
Infrastructure – See Managed  
Managed – A mode used to communicate to a 802.11b access point. This mode is  
necessary to communicate to a wire LAN through an access point.  
NIC – Network Interface Card.  
Peer to Peer – See Adhoc  
SSID – Service Set Identifier. This defines a local network ID similar to a NT domain  
WEP – Wired Equivalency Privacy. This is an encryption standard that allows for security  
across 802.11b networks between the NIC and the access point.  
 

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