how can i network a govt or private secretariat with about Fifty systems, without the use of cat 5 cables.

Meraki infrastructure is your complete solution for deploying wireless networks of any size.

This a very reasonable priced networking company. The products they have can be used to build a reliable network infostructure that can be added to as needed...

They have excelent IT management for their equipment with free console monitoring or server monitoring equipment...

It will work on small or large networks and from remote applications to other remote applications.

I have personally been in touch with these people and they have helped in the design of a networking project covering 125 acres for me!