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Unable to create provider - protocol version not supported

We developed an xml application for the cisco phone using our test call manager (version 10.5). This xml application uses jtapi to communicate with cucm. Some test users running version 9.x of cucm are getting the following error.

Unable to create provider - protocol version not supported - current version E0000. compatible versions 0x00080000, 0x00080001, 0x00090000, 0x00090001....

Is the jtapi version we are using 10.x not backward compatible so that our application can support older versions of cucm?

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Dustin,

  For a successful connection JTAPI version should always be lower than CUCM. Take a look at the compatability matrix at: https://developer.cisco.com/site/jtapi/wiki/jtapi-ucm-compatibility-matrix/

Using JTAPI from CUCM 9.x version would resolve your issue.

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