Device Firmware Updates Overview
Device loads are the software and firmware for devices such as IP phones, telepresence systems, and others that are provisioned by and register to Cisco Unified Communications Manager. During installation or upgrade, Cisco Unified Communications Manager includes the latest loads available based on when the version of Cisco Unified Communications Manager was released. Cisco regularly releases updated firmware to introduce new features and software fixes and you may wish to update your phones to a newer load without waiting for a Cisco Unified Communications Manager upgrade that includes that load.
Before endpoints can upgrade to a new version of software, the files required by the new load must be made available for download at a location the endpoints have access to. The most common location is the Cisco UCM node with the Cisco TFTP service activated, called the "TFTP server". Some phones also support using an alternate download location, called a "load server".
If you want to get a list, view, or download files that already in the tftp directory on any server you can use the CLI command file list tftp to see the files in the TFTP directory, file view tftp to view a file, and file get tftp to get a copy of a file in the TFTP directory. For more information, see the Command Line Interface Reference Guide for Cisco Unified Communications Solutions. You may also use a web browser to download any TFTP file by going to the URL "http://<tftp_server>:6970/<filename>".
You can apply a new load to a single device before configuring it as a systemwide default. This method is useful for testing purposes. Remember, however, that all other devices of that type use the old load until you update the systemwide defaults with the new load.