Enhance the functionality of your Cisco IP phone and Plantronics wireless headset with the APC-4 (Cisco) EHS 37978-01 adapter. This Electronic Hook Switch (EHS) cable enables seamless remote call control, allowing you to answer, end, and manage calls directly from your headset—without ever touching your phone. Ideal for busy professionals, call centers, or reception desks, this adapter streamlines workflow and boosts productivity, all while maintaining crystal-clear audio quality. With its easy plug-and-play setup, integrating the APC-4 EHS adapter into your communication system is both quick and hassle-free.
Blackwire 3310-M USB-A Microsoft (Poly 212703-101 aka HP 767F6AA)
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Neck Band Adapters 64398-01
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HALO Business Edition (Black) BM05-1942
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Plantronics EHS Adapter (Poly 85638-01 or HP 85S12AA) 



