The Polycom VVX 600 is an upgraded version of the Polycom VVX 500, the first phone we reviewed out of Polycom’s expanding line of Business Media Phones. The two phones are nearly identical in build, except that the newer VVX 600 has a larger capacitive touch screen (4.3” wide, 480 by 272 pixels versus the smaller VVX 500’s 3.5”, 320 by 240 pixels). Like the VVX 500, the 600 comes with an RJ-9 headset port, and two USB ports. The phone comes standard with PoE support, which means if you're not planning on using PoE, the power supply accessory is extra. The VVX 600 supports 16 line appearances, 4 more than the VVX 500.