Loading The Rom File; Configuring The Vlan; Querying The Dhcp (Dynamic Host Configuration Protocol) Server; Contacting The Provisioning Server - Yealink T58A Administrator's Manual

Loading the ROM File

The ROM file resides in the flash memory of the device. The device comes from the factory with a ROM file
preloaded. During initialization, the device runs a bootstrap loader that loads and executes the ROM file.

Configuring the VLAN

If you connect the device to a switch, the switch notifies the device of the VLAN information defined on the
switch (if using LLDP or CDP). The device can then proceed with the DHCP request for its network settings
(if using DHCP).

Querying the DHCP (Dynamic Host Configuration Protocol) Server

The device is capable of querying a DHCP server.
After network connectivity is established, the device can obtain the following network parameters from the
DHCP server during initialization:
• IP Address
• Subnet Mask
• Default Gateway
• Primary DNS
• Secondary DNS
By default, the devices obtain these parameters from a DHCPv4. You can configure network parameters of
the device manually if any of them are not supplied by the DHCP server.

Contacting the Provisioning Server

If you configure the device to obtain configurations from the provisioning server, it will be connected to the
provisioning server, and then download the boot file and configuration file(s) during startup. The device
will be able to resolve and update configurations written in the configuration file(s). If the device does not
obtain configurations from the provisioning server, the device will use the configurations stored in the flash
memory.

Updating Firmware

If you define the access URL of firmware in the configuration file, the device will download firmware from
the provisioning server. If the MD5 value of the downloaded firmware file differs from the one stored in the
flash memory, the device will perform a firmware update.
You can manually upgrade the firmware if the device does not download firmware from the provisioning
server.

Downloading the Resource Files

In addition to the configuration file(s), the device 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 devices begin the initialization process:
1. The power LED indicators of T58A/T56A/T55A/VP59 glow red.
The mute touch key LED indicators of CP960 glow red.
| Getting Started | 8