Yealink Firmware 84.0.42

Posted on 12. March 2019

Dear NFON customers,

as already announced in the blog post of 04. March 2019, a bug was found in the Yealink firmware 84.0.28. Due to this error in very rare cases the phone can lose the network connection.

For the Yealink T4-S series a bugfixed firmware 84.0.42 is now available in the Admin Portal.

Yealink strongly recommends to not to use the affected firmware any longer.
Therefore we will update all affected phones to firmware FW 84.0.42 in the next maintenance window.

Please note that the firmware is not yet compatible with the NCTI standard.

We apologize for any inconvenience caused.

Kind regards,
the NFON team

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