Session Initiation Protocol Application Architecture; Bootrom - Polycom IP 320 Administrator's Manual

Session Initiation Protocol Application Architecture

BootROM

The software architecture of the SIP application is made of 4 basic components:
• BootROM—loads first when the phone is powered on
• SIP Application—software that makes the device a phone
• Configuration—configuration parameters stored in separate files
• Resource Files—optional, needed by some of the advanced features
The BootROM is a small application that resides in the flash memory on the
phone. All phones come from the factory with a BootROM pre-loaded.
The BootROM performs the following tasks in order:
1. Performs a power on self test (POST).
2. (Optional) Allows you to enter the setup menu where various network
and provisioning options can be set.
The BootROM software controls the user interface when the setup menu
is accessed.
3. Requests IP settings and accesses the provisioning server (or boot server)
to look for any updates to the BootROM application.
If updates are found, they are downloaded and saved to flash memory,
eventually overwriting itself after verifying the integrity of the download.
4. If a new BootROM is downloaded, formats the file system clearing out
any application software and configuration files that may have been
present.
Overview
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