Yealink VC400, Administrator'S Manual

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Getting Started
39
Powering the System On and Off
Note
To power on the system:
After all components are connected, press on the VC400/VC120 codec. The indicator LED
on the VC400/VC120 codec then illuminates solid green.
To power off the system:
Do one of the following:
– Long press on the VC400/VC120 codec.
– Short press on the VC400/VC120 codec, the display device will prompt “Press the
power button to turn off the system. Press any button on remote control to cancel”.
Press again to power off the system or press any button on the remote control to
cancel.
System Initialization
Once you have power on the system, it will begin its initialization process.
During the initialization process, the following events take place:
Loading the ROM file
The ROM file sits in the flash memory of the system. Systems come from the factory with a ROM
file preloaded. During initialization, systems run a bootstrap loader that loads and executes the
ROM file.
Configuring the VLAN
If the system is connected to a switch, the switch will notify the system about the VLAN
information defined on the switch.
Querying the DHCP (Dynamic Host Configuration Protocol) Server
The system is capable of querying a DHCP server. DHCP is enabled on the system by default.
The following network settings can be obtained from the DHCP server during initialization:

IP Address

Subnet Mask

Gateway
Caution!
To avoid corrupting the system, you should always power off the system using the
power button on the VC400/VC120 codec. After turning the power off in this way, wait at least 15
seconds before you unplug the power adapter from the VC400/VC120 codec. This helps to
ensure that the system powers off correctly.