# Wireless LAN to LAN bridge

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#### techie

What is the most cost effective way of connecting two 10baseT LANs operating in 2 line-of-sight buildings less than 1KM away. The data speed required is very low and any rates of 128kbps or higher are acceptable. The connection has to be transparent (requiring no setups etc) and computers in the two buildings should appear in the network neighbourhood as on any LAN.

#### sparkytron

##### Junior Member level 3
It sounds like you want to use a "wireless ethernet bridge".

For example:
hxxp://www.digital-wireless.com/sem.htm

#### techie

It may sound a silly but I would still ask. Is it possible to use a laser diode (the one found in cheap laser pointers) on the TX wires of the RJ45 cable and some sort of photodiode arragement on the other end thus forming a short range wireless ethernet extension.

:idea:

#### dpechman

its possible to transmit data by cheap laser pointers, but not at this speed...the high speed lasers are not cheap! at least so cheap like the pointers....
i have maked some test with this pointer and works very well with low speed...(9600kbps)

#### Hishamsaleh

##### Full Member level 1
thats right.... with laser beem it works perfectly.. and secured... but have two problems:
1) media between Tx and Rx must be always clear
2) Speed depends on laser transmitter effeciency which cost a lot!!!! (lets say from $1 for 3kbps to$600 50 s/t kbps...)

this was a graduation project in my college last year... the conclugion was to make rf is better speed and cost!

#### flatulent

D-Link makes theDWL-900AP which has a bridge configuration. For security you can program the ones at each end of the link to only communicate with the other by their serial number and also to use 128 bit encryption. They have coax sockets and D-Link sells outdoor antennas with up to 20 dB gain.

#### cancel

##### Full Member level 5

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