"A system administrator's guide to VoIP technologies"--Cover.

More and more businesses today have their receive phone service through Internet instead of local phone company lines. Many businesses are also using their inte

Im Mittelpunkt der Diskussion stehen hier existierende und neue Technologien für die Vermittlung von Sprachverkehr über das Internet Protocol (IP). - bis vor

This guide shows programmers and administrators how to implement, program and administer VOIP systems using open source tools instead of more expensive options.

Put your phone system on your computer network and see the savings See how to get started with VoIP, how it works, and why it saves you money VoIP is techspeak