Help CenterThe Poly CS540 is compatible with 98% of corded desk phones. Whether you have Cisco, Mitel, Avaya, Yealink, Grandstream, Panasonic, AT&T and many others, the CS540 will work.
It must be a corded desk phone with a keypad and handset like the image below, and if you need the ability to answer/end calls when away from your desk you'll need to order a compatible remote answering accessory to go with your CS540 wireless headset. Without this accessory you'll have to answer calls at your phone by pressing the headset button or by physically removing the handset and setting it on your desk.
If you're unsure which accessory is required, contact us today and we can verify compatibility for you.