Developing Telecom Class Software

... there is lot more to be learnt to create highly available systems, the first atempt today took me to http://www.sun.com/blueprints/1100/HAFund.pdf which gave head start into high availability fundamentals related with the hardware and software, associated concepts of reliability and serviceability and some statistics ! that would help us quanify the results... that brought another question to my mind what does it takes to create a highly available J2EE application (read )... more to follow...