A:Answer Hi! We are sorry, but to confirm if the headset is compatible, we need to know the model number of the ESI phone system. If you have the model information, we recommend that you access our Headset Compatibility Guide: https://compatibility.plantronics.com/deskphone, where you can find all the compatible solutions available for your desk phone.
If you require further assistance, please don’t hesitate to contact our Customer Care Team at 1-916-928-7561.