The communications world is split in two—between the things you do on the telephone and the things you do on the computer.
The split exists because most real-time (synchronous) communications--like telephone calls and voice mail--depend on one network, while message based (asynchronous) communications--like e-mail--depend on a separate, incompatible network.
Microsoft unified communications technologies tear down the walls that separate tele-communications and computing. And they do it with software that leverages your existing telecommunications infrastructure.
A comprehensive person-to-person communication solution unites communication systems and tools:
and delivers complete communications tools:
Tools and Technologies