ITXC Corporation (Internet Telephony Exchange Carrier) was a US-based wholesale provider of voice over IP internet-based phone calls.
It was cofounded by Tom Evslin and his wife Mary in 1997 with seed money from AT&T and VocalTec (Nasdaq: VOCL).
[1] In 2000, it had the largest internet telephony network in the world[citation needed].
[2] The technology to power ITXC's voice over IP network was initially provided by Israeli company VocalTec,[1] who also owned 20% of the company but later sold its stake.
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