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With Cisco CallManager and a Cisco IOS voice gateway, an inbound call from the PSTN directly to Cisco Unity is dropped, and the "Error message Cause i = 0x80E5 - Message not compatible with call state" error message appears

Core Issue

This issue occurs because of the protocol incompatibility with the call state of Cisco Unity.

When this issue occurs, the Error message Cause i = 0x80E5 - Message not compatible with call state error message appears.

Resolution

In order to resolve this issue, uncheck Display IE Delivery in the H.323 gateway configuration page in the Cisco CallManager.

Note: The public switched telephone network (PSTN) does not support Display IE in q.931 messages.

Refer to the Display IE section of CallManager CallerID Feature Issues for more information on the Display IE Delivery option.

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