Infrared Communication can be active in many places, for example wide campus of university and factory or hospital that has several annexes in site.

Infrared Communication is introduced in this paper from the viewpoint of system configuration. Where is it used in the network actually?

At this print shop the design office and the print factory are located apart 300m at both side of the road and it is difficult to deliver the print data. Data of book and pamphlet is all digitized as the result of the trend of print industry. Infrared Communication is much suitable for the fast delivery of the draft and the large size file of image.

This is the campus of university. As the part of private network connection, two optical link heads equipped at veranda of the 5-th floor of main building and an optical link head at each rooftop of laboratory 1 and 2 were connected by high speed Infrared Communication LAN. There are railway and road between them that are apart 200m or 350m and the cable connection is difficult. The problem of the connection between distant buildings can be solved by the deployment of Infrared Communication System. Moreover the data signal does not leak unlikely from radio wave and the reliable communication of high security is maintained.