This model supports sixteen SIP accounts and delivers advanced IP Telephony features as well as crystal clear wideband audio. The Cisco 7861 has a generously sized 3.5 greyscale backlit display and supports PoE, an optional power supply is available for non-PoE deployments. This model has 16 programmable memory keys which can be set up as line keys or can support call features, for example speed dialling with BLF.