Why these services?
Convergence has arrived!
"What it’s happening in a network?"
Answer: Applications!

The necessity to deploy new Applications
-Multimedia Collaboration enables people in remote places to communicate and cooperate, combines conferencing, streaming, instant messaging as well as other collaboration applications into a single easy-to-use intuitive environment:
-Secure Instant Messaging (peer2peer)
-Grid-Computing, Office Automation parallel and distributed system that enables the sharing, selection, and aggregation of geographically distributed autonomous resources dynamically at runtime depending on their availability, capability, performance, cost, and users' quality-of - service requirements.
- IP Telephony
-Customer Interaction Services

The necessity to protect current Applications
-Client-server, E-mail, Intranet, Remote access etc

The necessity to restrict unsanctioned Applications
-Web browsing, Internet Radio, Instant Messaging etc

All application will generate unpredictable Traffic pattern (could be considered an effect of convergence) .

All of listed issues have one common base, availability and reliability of the the Date and Voice Network.
This must provide:
-Availability
Always on – 99,99 %
Avoiding single point of failure
-Mobility
Access facility to company resources from remote location
-Security
Protect from internal and external potential attackers
Protect against viruses, phishing, worm’s etc

All of them will be achieved using proper design, implementation and reliable equipments.