Getting Started
11
The initialization process of the IP phone is responsible for network connectivity and
operation of the IP phone in your local network.
Once you connect your IP phone to the network and to an electrical supply, the IP phone
begins its initialization process.
During the initialization process, the following events take place:
Loading the ROM file
The ROM file resides in the flash memory of the IP phone. The IP phone comes from the
factory with a ROM file preloaded. During initialization, the IP phone runs a bootstrap
loader that loads and executes the ROM file.
Configuring the VLAN
If the IP phone is connected to a switch, the switch notifies the IP phone of the VLAN
information defined on the switch (if using LLDP). The IP phone can then proceed with
the DHCP request for its network settings (if using DHCP).
DHCP (Dynamic Host Configuration Protocol)
The IP phone is capable of querying a DHCP server. DHCP is enabled on the IP phone
by default. The following network parameters can be obtained from the DHCP server
during initialization:
IP Address
Subnet Mask
Gateway
Primary DNS (Domain Name Server)
Secondary DNS
You need to configure the network parameters of the IP phone manually if any of them is
not supplied by the DHCP server. For more information on configuring network
parameters manually, refer to
Configuring Network Parameters Manually
on page
Contacting the TFTP server
If the IP phone is configured to obtain configurations from the TFTP server, it will connect
to the TFTP server and download the configuration file(s) during booting up. The IP
phone will be able to resolve and apply the configurations written in the configuration
file(s). If the IP phone does not obtain the configurations from the TFTP server, the IP
phone will use the configurations stored in the flash memory.
Updating the firmware
If the access URL of the firmware has been defined in the configuration file, the IP phone
will download the firmware from the provisioning server. If the MD5 value of the
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