Administrator's Manual 7. Introduction
Version 2.2.8 41 400HD Series IP Phones
7 Introduction
By default, the IP phone is ready for out-of-the-box deployment using its automatic
provisioning capabilities.
The IP phone offers a built-in mechanism for automatically upgrading its software image and
updating its configuration. This method is used to upgrade the phone firmware and update its
configuration, by remotely downloading an updated software image and configuration file.
The automatic update mechanism helps you keep your software image and configuration
up-to-date, by performing routine checks for newer software versions and configuration files,
as well as allowing you to perform manual checks.
The automatic update mechanism is as follows:
Before connecting the phone, verify that the provisioning server is running and that the
firmware and configuration files are located in the correct location.
Connect your phone to the IP network, and then connect the phone to the power outlet.
During DHCP negotiation, the phone requests for DHCP options 66/67/160 to receive
provisioning information. The DHCP server should respond with Option 160 providing
the provisioning URL or Options 66 and 67 providing the TFTP IP address and firmware
file name respectively.
The phone then checks whether new firmware is available by checking the firmware file
header. If the version is different from the one currently running on the phone, the phone
downloads the complete image and burns it to its flash memory.
If a new firmware is unavailable, the phone then checks whether a new configuration is
available. If a configuration file is available on the server, the phone downloads it and
updates the phone's configuration after verifying that the configuration file is related to
the phone model. When a configuration update is needed, the phone might reboot.
Note:
• In the DHCP Discover message, the phone publishes its model name in Option fields
60 and 77 (e.g. 440HD). If the administrator wants to provide different provisioning
information to different phone models, the administrator can set up a policy in the
DHCP server according to the phone model name.
• If the phone is powered off for some reason during the firmware upgrade process, the
phone will be unusable and the recovery process must be performed (see Section 47
on page 257).
• You can only use firmware files with an .img extension and configuration files with a
.cfg extension.
• To "force" the firmware or configuration file to be retrieved immediately regardless of
the 'Check Period' value, click the Check Now button on the relevant page on the
Web interface.
• An additional auto-provisioning mechanism is supported if the provisioning
environment does not provide all the required information (e.g. DHCP options).
Note: Automatic mass provisioning of IP phones using the DHCP provisioning method
can alternatively be performed from the AudioCodes EMS Provisioning Server in the IP
Phones Management Server. For detailed information, see the IP Phone Management
Server Administrator's Manual.
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