The firmware version 66.84.133.8 contains the necessary changes to support the improved interoperability with SIP certified desktop phones like the Yealink T4xS series introduced with SwyxWare version 12.10, such as

• Hot desking,
• Call journal synchronization with Swyx Server and
• Users can configure multiple numbers on the desk phone for incoming and outgoing calls

The firmware version 66.84.133.11 also contains a bugfix, which improves the usage with Netphone Server 12.10.

This firmware version is already available in our Firmware Information Service FIS.

If you upgrade phones that have a firmware version earlier than V66.84.133.1, you must first install V66.84.133.1 before you install the newest firmware version.

Downloading the firmware and distributing to all connected Yealink phones can be simply done within the Swyx Control Center SCC. All necessary steps are described in the Swyx Online Help.