Cordless Mobility  Each 480i CT base supports up to 4 cordless handsets Large Base Unit Display  Eight-line backlit screen with six context sensitive softkeys provides more information and flexibility in call handling Enhanced Call Management  Large storage for personal directory, callers log, and redial list Tight Integration  Support for multiple IP telephony systems including BroadWorks® , Nortel, Sylantro, and Asterisk SIP Multiple Line/Call Appearance Lights  Supports up to 9 simultaneous calls. Juggle multiple calls easily with a single press of a button Shared Call Appearances  Shared calls allow you to place a call on hold at one set and pick it up easily at another set Remarkable Audio  Quality speakerphone with excellent voice clarity and delivery Protect Your Investments  Firmware upgrades can be downloaded and installed in the field as standards develop and protocols evolve Less Wiring  Built in dual 10/100 switched Ethernet ports let you share a connection with your computer. Inline power support eliminates power adapters