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Computer Talk can supply and install wireless networking to complement your cabled network. However, first you should read this...

Wireless LAN technology, whilst there are many manufacturers, uses the same principles across the range of products. Computers can join an existing network without the need for a cabled connection. The most units operate at 2.4 GHz (11/54/108Mbps) and coverage varies depending on the structure surrounding the access points and to some degree the technology of the manufacturer. In general 11Mbps systems will offer far greater coverage than 54Mbps systems which tend to only operate reliably at full speed within one room. 108Mbps technologies generally use two channels at 54Mbps which further limits the numbers of units to be installed and therefore the ability to provide school wide coverage. The costs of Wireless LAN products can vary for reasons of technology and of course the brand name.

It all sounds very impressive but the real question is whether this technology offers you the advantages you think it will and whether they outweigh the disadvantages. A good and reputable supplier will discuss this with you and help ensure that you know you are buying the right solution for your situation.

Pros and Cons

The main advantage of Wireless over cabling is that you can add a new computer, once the network is in place, by simply installing a wireless card and placing it within the range covered by the system.

The main advantages of Cabling over Wireless connections are as follows:

•  Data Speeds - Currently Wireless LANs run at a maximum of 108Mbps throughput compared to up to 1000Mbps over cable.

•  Security - The transmission of data through radio technology is open to security breach (despite encryption) unlike point to point cabling. Also the processing of 128 bit encryption can effectively reduce the network bandwidth by up to 40%.

•  Reliability - Whilst Wireless LANS are considered to be reasonably reliable if surveyed and installed within the manufacturers specifications. There are factors, which may affect this that would have no impact on cabled systems.

•  Sharing - Each cabled PC has its own 100/1000Mbps link to the network. Wireless PCs and Laptops share the Wireless bandwidth available. This can severely limit the number of devices you can connect whilst still maintaining acceptable performance.

In Summary:

Wireless LANS are ideal and unbeatable where other options are too expensive or impractical. However as any Wireless LAN supplier would (or at least should) tell you this technology is not an equal alternative to cabling systems and should not be seen as one. It may be that a Wireless LAN will supplement your cabling needs to offer easy access for Laptops anywhere in your school. Wherever possible, classrooms should be given a permanent full speed cabled connection.

And remember... A Wireless system should never be installed without a full site survey.