Plantronics cs510

New never used, without original box. Phone Support: The APC-45 Cisco EHS supports the Cisco SPA900 Small Business IP Phones (also known as Linksys). It also supports the Cisco SPA512G, SPA514G and SPA525G2 (with 7.5.1 software release and above). Note: By default EHS is disabled on SPA512G, SPA514G and SPA525G2. You will need to turn it on by configuring the following parameter using the web page or remote provisioning: User Tab -> Electronic Hook Switch The APC-45 does not work with the SPA504G (this phone does NOT have EHS capability) For 79xx Cisco phones use the APC-41 EHS Cable and for 89xx and 99xx Cisco phones use the APU-71 EHS. Headset Support: The Plantronics Cisco APC-45 EHS works with the following Plantronics wireless headsets: CS510, CS520, CS520, Savi WO300, Savi WO350, Savi 700 series. http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SUA2200I&tab=compare&list=SUA2200I;SUA3000RMI2U;