Based on SIP, the Cisco SPA303 3-line IP phone with 2-port switch helps ensure comprehensive interoperability with equipment from voice over IP (Vo IP) infrastructure leaders, enabling service providers to quickly roll out competitive, feature-rich services to their customers. With hundreds of features & configurable service parameters, the Cisco SPA303 addresses the requirements of traditional business users while building on the advantages of IP telephony. Features such as easy station moves & shared line appearances are just some of the many advantages of the SPA303. The Cisco SPA303 uses standard encryption protocols to perform highly secure remote provisioning & unobtrusive in-service software upgrades. Remote provisioning tools include detailed performance measurement & troubleshooting features, enabling network providers to deliver high-quality support to their subscribers. Remote provisioning also saves service providers the time & expense of managing, preloading, & reconfiguring customer premises equipment.