This document provides an administration guide for Cisco Small Business IP Phone models SPA 301, 303, 501G, 502G, 504G, 508G, 509G, 525G/525G2, and WIP310. It contains information on getting started with the phones, including upgrading firmware, determining the IP address, and using the web-based configuration utility. The document also covers configuring lines, extensions, call features, audio settings, SIP, security, and provisioning of the IP phone models.