English 
Deutsch Dear NFON customers,
The following FW versions have been released and are now available in the administration portal.
Yealink:
T4 S Series, T52 & T54S: FW X.84.0.28
Fixes:
- Phone book usable again for “on hold call”
- DND status is transferred via uaCSTA (NCTI premium)
Note:
- Firmware is not yet NCTI Standard compatible
T4 G Series: FW X.83.0.83
with the blog entry from 26th September, 2017 it was already announced that the Yealink T41P, T42G, T46G and T48G is “End Of Life”.
Support can only be provided for phones with the current firmware version 83.0.83.
Fixes:
- Phone book usable again for “on hold call”
- DND status is transferred via uaCSTA (NCTI premium)
- Final firmware version for this series
Snom:
710 / D710 /720 / 760 / D745 – FW 8.9.3.80
Fixes:
- Final firmware version for this series
- Various bug fixes
For more information, see http://wiki.snom.com/Firmware/V8_9_3_80
For firmware mass updates please contact the support.
Kind regards,
the NFON Team