IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN).

IP Telephony today is converging your PBX to an application on your data network. NSI has been assisting organizations since 1998 implement IP Telephony solutions including small business, K12, federal agencies, remote offices, telecommuters, and enterprise organizations.

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