For the most recent information on recommended hardware platforms, software releases, and firmware versions for Cisco Unified Communications System deployments based on Cisco Unified CallManager, frequently refer to the System Test Release Matrix, latest Release Notes, and other documentation available at the following location:
Note The platforms and software versions recommended in the System Release Matrix and Release Notes are not the only supportable deployment options. They represent the combinations of hardware and software that Cisco has subjected to the most extensive system-level testing. This ongoing testing is conducted using a variety of deployment models, several end-station size categories, and realistic call flows, traffic patterns, and use cases. For information on other possible hardware and software options for Cisco Unified Communications deployments, contact your Cisco account representative.