T42S VoIP SIP telephone, 2 x Gigabit Ethernet, 15 keys (3 pages of 5 keys), PoE required, AC optional, 2.7 inch backlit LCD, HD audio, RJ9 headset jack, EHS support for specific Jabra, Plantronics & Sennhesier headsets (cable required, SKU #EHS36 or SKU #EHS40), 1 x USB, WiFi support (requires adapter, SKU #WF40), Bluetooth support…