VoIPowering Your Office with Asterisk: SOHO VoIP

From VoIP Planet: VoIPowering Your Office with Asterisk: SOHO VoIP.

Today's exciting installment shows how to have both old-fashioned analog phone service and VoIP on the same local network, for small shops with fewer than ten analog phone lines. Scenario: you want to keep your existing analog lines, add VoIP, use Asterisk for your PBX, and have a reasonable upgrade path for future changes and additions.