Grandstream GS-GXP2124 Enterprise 4-Line HD IP Desk/VoIP Phone and Devices 4 Line keys with up to 4 SIP accounts, 4 XML programmable context-sensitive soft keys, and up to 32 call appearances with 24+4 speed-dial/BLF extension keys with dual-color LED 240 x 120 Pixel backlit graphical LCD display with up to 8 level grayscale Dual switched 10/100/1000 Mbps Gigabit Ethernet ports with integrated PoE; supports Electronic Hook-Switch (EHS) HD wideband audio, superb full-duplex hands-free speakerphone with advanced acoustic echo cancellation and excellent double-talk performance Built-In personalized application service (e.g., local weather, stock, currencies, etc), flexible LCD content customization using XML