Cisco SPA504G 4-Line IP Phone

For business or home office use.
Full-featured 4-line business-class IP phone supporting Power over Ethernet (PoE).
Monochrome backlit display for ease of use, aesthetics, and on-screen applications.
Connects directly to an Internet telephone service provider or to an IP private branch exchange (PBX).
Dual switched Ethernet ports for connecting a computer behind the phone, reducing cabling costs.
Wideband audio for unsurpassed voice clarity and enhanced speaker quality.
Easy installation and highly secure remote provisioning, as well as menu-based and web-based configuration.
Supports up to two Cisco® SPA500S Expansion Module, adding up to 64 additional buttons*.
Supports both Session Initiation Protocol (SIP) and Smart Phone Control Protocol (SPCP) with the Cisco Unified Communications 500 Series for Small Business.