VoIPowering Your Office with Asterisk: Hardware Mysteries Explained

Carla Schroder provides a nice introduction to Asterisk hardware options in VoIPowering Your Office with Asterisk: Hardware Mysteries Explained, care of VoIPPlanet.

It's fun and useful to explore pure IP telephony, but most folks want PSTN (Public Switched Telephone Network) integration as well. (PSTN is also known as POTS: Plain Old Telephone Service.) An Asterisk server can interface with "legacy" systems, which means "not IP," or your ordinary old digital and analog telephone systems.