The carrier's expansion of its IP services for businesses is a likely response to increasing competitive pressures from major telephone companies that have also recently entered the market for selling VoIP to businesses. Small and midsize businesses are among the earliest adopters of the technology, which makes phone calling cheaper and adds new features not available on traditional phone networks.
AT&T VoIP adds to equipment list
The carrier's Internet phone service now works with all major traditional phone vendors' equipment.
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