IP Telephone

A VoIP phone uses voice over IP (VoIP) technologies allowing telephone calls to be made over an IP network such as the Internet instead of the ordinary PSTN system. Calls can traverse the Internet, or a private IP network such as that of a company
Click here to view IP VoIP architecture at ISI

CSSC is currently Installing IP Telephony System in ISI Kolkata and ISI Tezpur Centres very soon.

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