Jabra 5575 Speak2 55 MS Teams Instructions
How do I manually reset the Jabra Speak2 55/75 to the default settings?
To reset the speakerphone to the factory settings, simultaneously press and hold (8 seconds) the Answer call button and the End call button until “restore to factory default” is announced by the speakerphone.
Resetting the speakerphone clears all personalized settings and also clears the list of paired Bluetooth devices. After a factory reset, it is necessary to re-pair the Jabra speakerphone with your Bluetooth devices.
Applicable products
https://www.jabra.com/supportpages/jabra-speak2-55/2755-109/faq/699a8560-fb174e1f-96b1-14f5c9589341