The IP5132-SD Telephone features a 4 line LCD backlit display, 4 soft keys to dynamically control functions of the telephone, 20 programmable feature buttons with LED indicators, Fixed feature buttons include message, microphone, speaker, speed dial, redial, conference/transfer, hold, and volume up/down, a full duplex speakerphone for hands free operation, and a built-in Gigabit Ethernet switch 10/100/1000 Mbps witch for connection to LAN and collocated PC. The IP5022-SD is compatible with CIX systems running Release 5.2 or higher software.