At the carrier switching office, the voice is separated from the data and converted back to regular circuit-switched voice.

CNN: Voice over DSL trial passes muster

The traffic was combined by the IAD, and fed down the DSL line to a Choice One DSL multiplexer in the local Bell Atlantic switching office.

CNN: Voice over DSL trial passes muster

It was then piped back to Choice One's own switching office where the Internet traffic was sent to the Internet and the voice was converted and dropped onto the regular phone network.

CNN: Voice over DSL trial passes muster

But before the young staffer can answer, he's in the member's office, switching his focus from his spreadsheet to the size and layout.

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