The Toshiba IP5122-SD is an IP telephone with a 4 line LCD display, 10 programmable buttons, and features like conferencing, transferring calls, and volume control. It connects to a network via Ethernet and supports Power over Ethernet. The phone is compatible with Toshiba CIX systems running software version 5.2 or higher and requires an IP Endpoint License when used on certain Strata CIX systems.