Administrator’s Guide for SIP-T5 Series Smart Media Phones
16
Initialization Process Overview
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 or CDP). The IP phone can then proceed with
the DHCP request for its network settings (if using DHCP). For more information on VLAN, refer
to VLAN on page 48.
Querying the DHCP (Dynamic Host Configuration Protocol) Server
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 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 28.
Contacting the provisioning server
If the IP phone is configured to obtain configurations from the provisioning server, it will
connect to the provisioning server and download the configuration file(s) during startup. The IP
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 IP phone will use
configurations stored in the flash memory. For more information, refer to Setting Up Your
Phones with a Provisioning Server on page 105.
Updating firmware
If the access URL of firmware is defined in the configuration file, the IP phone will download
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