85638-01 - Plantronics Adapter Cord Cable (Formerly 40287-05) EHS Extension

Plantronics Cable 85638-01 (formerly 40287-05) is used with Plantronics EHS cords such as Plantronics APC-42 EHS on some Cisco, Polycom, Grandstream or other brand phone models where the headset port is located too far for the EHS to reach. It is ONLY needed if you need longer cord length for your EHS, such as if you have a Cisco expansion module (sidecar) on your phone or Grandstream 2100-series phone, Polycom VVX101, VVX201.