I have a Cisco IP Phone 7962 and a Plantronics CS55 wireless headset

Yes.  The Plantronics CS55 is compatible with the Cisco telephone you have.  If you want to answer remotely in order to hangup/pickup from the headset while roaming the office you'll also want to get the EHS adapter for Cisco phone by using Plantronics APC-41 (replaces the APC-4). Plantronics no longer manufacturers the CS55 nor CS50.  See replacement models below.

Replacement Models for CS55:

• Plantronics CS510
• Plantronics CS520
• Plantronics CS530
• Plantronics CS540
• Plantronics Savi W710 
• Plantronics Savi W720
• Plantronics Savi W730
• Plantronics Savi W740
• Plantronics Savi W745
• Plantronics Legend CS

For instructions on using the APC-41 with your Cisco phone download the Hooks witch Guide.  The Plantronics APC-41 is compatible with the following Cisco phones: 7942G, 7945G, 7962G, 7965G, 7975G

Use the following Plantronics Wireless with the APC-41 EHS cable:

• CS50, CS55
• CS351/ CS351N CS361/ CS361N
• CS510, CS520 Duo, CS530, CS540 Convertible
• MDA200
• Savi W710
• Savi W720
• Savi W730
• Savi W740
• Savi W745
• Legend CS

Plantronics Legend CS (pictured above)

Other Cisco phones require the HL-10 remote lifter to allow the headset to pickup/hang-up calls. For instructions on using the APC-41 with your Cisco phone download the Plantronics EHS Hooks witch Guide.

If you have questions about your Cisco phone compatibility and which accessory is required for your phone feel free to start a chat session or call us 703-766-6363. Global Teck Worldwide provides a ProSetup Service that walks you through the complete installation of any headset on our website. All items mentioned in this article are available online for purchasing.