Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
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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 35.
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.
Updating firmware
If the access URL of firmware is defined in the configuration file, the IP phone will
download firmware from the provisioning server. If the MD5 value of the downloaded
firmware file differs from that of the image stored in the flash memory, the IP phone will
perform a firmware update.
Downloading the resource files
In addition to configuration file(s), the IP phone may require resource files before it can
deliver service. These resource files are optional, but if some particular features are
being deployed, these files are required.
The followings show examples of resource files:
Language packs
Ring tones
Contact files
After connected to the power and network, the IP phone begins the initializing process
by cycling through the following steps:
1. The power indicator LED illuminates green.
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