Connect your Plantronics wireless headset to your Polycom IP phone using the designated headset port! Compatible with Polycom IP 320/321 & 330/331 phones Approximately 18 inches long 2.5mm connection on one end connects to Polycom IP 320/321 or 330/331 phone; 4-pin modular RJ-9 connection on opposite end connects to M22 amplifier (replacing pigtail cord) or CS series wireless (replacing straight short cord) Genuine Plantronics accessory BTP Model: PL-78333-01MFR Part: 78333-01, 85R36AA
