02028nas a2200169   4500008004100000245002800041210002800069260001000097520155000107100002101657700001801678700002401696700001701720700002101737700001901758856008101777       2003                        eng d00aWireless School Network0 aWireless School Network  cApril3 aThe architecture of the wireless network consists of 3 main parts. The wireless infrastructure, the connection of the
wireless island to the rest network and the interconnection between the neighboring schools a near one participating in
the wireless network. The wireless connection supports Point-to-Multipoint technology [3] and uses the frequency band
2,4 Ghz to 2,4835 Ghz. The reserved bandwidth of this wireless LAN is order of magnitude 11 Mbps. In each school the
bridge device is connected to a newly equipped Fast Ethernet switch interconnecting the internal schools network to the
wireless network. Between the schools a fast Ethernet network is built using copper and Fiber optic cabling. The
interconnection of the wireless network upstream to the backbone is achieved with the use of the link between the E.A.O
and the local main distribution node of the EDUNET network. This link had to be upgrade because it will carry the
traffic from the wireless network too. The selected solution was the VDSL technology by engaging the appropriate
modems over a two-wire leased line between the E.A.O and the main node. We have a selected point in each school unit
that wireless bridge and antenna will be installed. The wireless bridge must stand near to antenna because long cabling
distances will produce noise in the transmission signal. The wireless bridge will be housed at waterproof cabinet, which
offers all the necessary specifications for protection and electric feeding. The waterproof cabinet is installed at the
antenna pylon.1 aBouras, Christos1 aKaraliotas, A1 aParaskevas, Mixalis1 aPapoutsis, V1 aNtokos, Christos1 aDrosopoulos, N  uhttp://telematics.upatras.gr/telematics/publications/wireless-school-network