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Headsets for Phones with a 2.5mm Headset Jack

If your cordless phone, corded phone or cellular phone has a standard 2.5mm, single small round hole marked "headset," you should be able to use any H-series headset along with either of the two adapter cords shown below (straight cord or the longer coiled cord).
Plantronics HW510 EncorePro Headset Monaural (with Noise Canceling Microphone)
Plantronics  Adapter Cable (QuickDisconnect - 2.5mm) for Polycom IP 320, 321, 330, 331, Panasonic, AT&T, RCA, Uniden, Zultys ZIP 4x4 and ZIP 4x5 and Other Phones with Standard 2.5mm Headset Port
Plantronics Long QD to 2.5mm Cable (10 ft) for Polycom IP 320, 321, 330, 331, Cisco Linksys SPA303, SPA303G, SPA501G, SPA502G, SPA504G, SPA508G, SPA509G, SPA525, 525G, SPA921, SPA922, SPA941, SPA942 and SPA962, Panasonic, AT&T, RCA, Uniden, Zultys ZIP 4x4 and ZIP 4x5 and Other Phones with Standard 2.5mm Headset Port
Suggested List: $120.00
Our Price: $66.00
Our Price: $18.95
Suggested List: $49.95
Our Price: $33.45