Has anyone experienced Cisco 840 tftp timeout and CFN Failure

[bettye-curry]

Intermittently experiencing the above error message using 9800 APs. Call Manager Version 14

[marce1000]

  - What software version is your 9800 controller running ? When dealing with such issues , use the latest
     advisory release for  starters.

 M.

[bettye-curry]

The 9800 controller is running Software version 8.10.196.0

Software Version

8.10.196.0

[marce1000]

  - That's impossible , a  9800 controller runs IOS-XE , you are referring to aireos releases ,

 M.

[bettye-curry]

I'm sorry its a 5520 Controller mix of 2802 and deploying 9800 APs

[bettye-curry]

Sorry for the mess-up.  We are migrating from a 2802i Ap to an 9120axi Ap on a 5520 Controller.  The issue with the 840 phone cropped up when they we are associating with the new APs.  we currently have 125 of the 700 Aps converted to the 9120s.

[marce1000]

  - To me this does not look like a native wireless problem; you may also post the question in
     https://community.cisco.com/t5/unified-communications-infrastructure/bd-p/discussions-uc-infrastructure
     unless you have the problem on specific AP-models and or specific controller model,

  M.