Yealink T5 Series, Administrator'S Manual

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Getting Started
19
Configuring the VLAN
If you connect the IP phone to a switch, the switch notifies the IP phone of the VLAN information defined on the
switch (if using LLDP or CDP). The IP phone can then proceed with the DHCP request for its network settings (if using
DHCP).
Querying the DHCP (Dynamic Host Configuration Protocol) Server
The IP phone is capable of querying a DHCP server.
After establishing network connectivity, the phone can obtain the following network parameters from the DHCP server
during initialization:
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IP Address
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Subnet Mask
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Default Gateway
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Primary DNS (Domain Name Server)
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Secondary DNS
By default, the phones obtain these parameters from a DHCPv4. You can configure network parameters of the IP phone
manually if any of them are not supplied by the DHCP server.
Contacting the Provisioning Server
If you configure the IP phone to obtain configurations from the provisioning server, it will be connected to the pro-
visioning server, and then download the boot file and configuration file(s) during startup. The phone will be able to
resolve and update configurations written in the configuration file(s). If the IP phone does not obtain configurations
from the provisioning server, the phone will use the configurations stored in the flash memory.
Updating Firmware
If you define the access URL of firmware in the configuration file, the phone will download the firmware from the pro-
visioning server. If the MD5 value of the downloaded the firmware file differs from that stored in the flash memory, the
phone will perform a firmware update.
You can manually upgrade firmware if the IP phone does not download the firmware from the provisioning server.
Downloading the Resource Files
In addition to the configuration file(s), the phone may require resource files before it provides service. These resource
files are optional, but if you deploy some particular features, these files are required.
Verifying Startup
After connected to the power and network, the IP phone begins the initialization process by cycling through the fol-
lowing steps:
1. The power LED indicator/mute LED indicator glows red.
2. The message “Welcome Initializing… please wait” appears on the phone screen when the IP phone starts up.
3. The main phone screen displays the following:
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Time and date
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Android keys (for T58V/T58A/T56A)
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Pre-installed applications (for CP960)
4. Tap Settings -> Status to check the IP phone status, the phone screen displays the valid IP address, MAC address,
firmware version, and so on.
If the IP phone has successfully passed through these steps, it starts up properly and is ready for use.