Introduction of cBarge for mixed shared lines.

The standard method to deploy these files is using the archive command from the privileged EXEC prompt: archive tar /xtract tftp:// /Cme-complete-fileset-12.0.tar flash:

The file is a comprehensive software bundle for Cisco Unified Communications Manager Express (CME) version 12.0 . It contains the essential resources needed to turn a Cisco Integrated Services Router (ISR) into a functional IP-PBX, including the Graphical User Interface (GUI), phone firmware, music-on-hold files, and localization data. Core Components of the 12.0 Fileset

After extraction, you must configure the router to serve these files to IP phones using the tftp-server flash: command for each firmware file. INSTALL CME 12 IN ROUTER ISR4321/K9 - Cisco Community

Because CME functionality is technically embedded within the Cisco IOS image itself, you do not "install" it as a separate application; rather, you extract this fileset to the router’s flash memory to provide the necessary support files.

This version introduced several critical updates for modern VoIP deployments:

CME 12.0 is specifically designed to run on and later releases. The complete fileset typically includes:

A set of HTML and XML files required to manage the system through a web browser instead of strictly using the CLI.

Use the show license all command to ensure you have the appropriate Unified Communications (UC) license activated.

Default files for Music on Hold (MOH) and standard ringtones.