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![]() ![]() If your network is live, make sure that you understand the potential impact of any command. All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The information in this document is based on these software and hardware versions, but applicable to all Cisco CallManager Express releases and Cisco IP phone loads:Ĭisco IOS? Router on Cisco IOS? Release 12.4(4)T with Cisco CallManager Express Release 3.4(0) Prerequisites RequirementsĮnsure that you meet these requirements before you attempt this configuration:Ĭisco IP phones are currently registered with Cisco CallManager Express. This document provides the procedure for how to upgrade Cisco IP phone firmware with Cisco CallManager Express.
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