12 line keys supporting up to 34 SIP lines 1 USB 2.0 Type-C for media, storage applications, headset, or expansion module 2 RJ-45 (10/100/1000BASE-TX Mbps) Headset Ports 1 RJ-9; 1 Electronic Hook Switch (EHS) port for optional APP-51 adapter Bluetooth headset compatibility;
12 / 48 Lines + Bluetooth + WiFi + Expansion Module Port