3. Important notes

An error "NFON" on the telephone display of the Panasonic KX-UTxxx.

After a call "NFON" is shown on the display. Dialing of call numbers can be done, yet "NFON" is displayed after each further call.

By pressing the Cancel key, your diplay will be reset.

Due to security guidelines this is the only way we can troubleshoot this error at the moment.

hint2

NCTI standard/CRM with Yealink

For security reasons the usage of the NCTI standard / CRM needs to be confirmed on the telephone initially