Grandstream GS-GXP1630 High-End IP Phone for Small Business Users VoIP Phone and Device 3 SIP accounts, 3 line keys, 4-way conferencing, 3 XML programmable context-sensitive soft keys HD audio on speakerphone and handset Dual-switched Gigabit ports, integrated PoE 8 dual-colored BLF/speed dial keys Up to 500 contacts, call history up to 200 records