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Why does the phone timeout when it downloads new firmware from the Cisco CallManager TFTP Server?

April 26, 2017cisco callmanager downloads firmware phone server TFTP timeout

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Why does the phone timeout when it downloads new firmware from the Cisco CallManager TFTP Server?

1 Answer

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A. Sometimes in centralized multi-site deployments, phones at far remote locations can experience timeout when they download new firmware from the headquarters TFTP server. This can be seen when latency between the phone and the TFTP server is higher than normal. In these cases where download timeouts are seen on remote phones, set up a local TFTP server at the remote site in order to resolve the issue. Refer to Cisco bug ID CSCsb10954 ( registered customers only) for more information.