3.Connect the MBU power adapter to the MBU, and plug-in the other end to an active power outlet (preferably a continuous power outlet without a switch to interrupt its power).
MBU
Phone socket to power socket
The POWER LED on the MBU lights up steady and the I-NETLED flashes as the MBU proceeds to power up.
When the power cycle is complete, the I-NETLED goes out, the POWER LED lights up steady, and then the I-NETLED lights up steady indicating the MBU has obtained an IP address and is ready to be configured.
I-Net LED
Power LED
Note: The Call LED lights up steady during incoming or outgoing VoIP and landline calls.
MBU 400 Installation Guide 15
