Digital Extender receiver power on differently in Group 700 and other Group series
FYI about Polycom Digital Extender Digital Extender Receiver, which is the unit connected to the Group side, gets power from the Group. Not from the its AC adapter and cable. When the Receiver is connecting to Group 700, its power is off when the Group 700 is power off. When the Receiver is connecting to Group 500, 300, or 310, its power is still on when the Group is power off with Group's power cable connected. Group 500, 300 and 310 keep providing power to the Receiver until Group's power cable is disconnected.