AT&T has launched its biggest push into IP telephony to date with the establishment of Global Clearinghouse and several technology trials.
Global Clearinghouse will enable Internet Service Providers (ISPs) and telcos to establish and operate phone to phone IP services to around 140 countries.
AT&T has also launched two trials of voice over IP virtual private Network services. One is an internal project networking corporate locations in six cities, while the other is with a financial institution.
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