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).

Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

 Much of IP telephony focuses on that challenge. At SpaceLink, we provide a rich portfolio of various IP-based PBX’s and IP telephone sets, our experienced engineers will help you make the best out of your IP based PBX investment and turn your personal mobile phone into a roaming office.