What connection cord and/or adapter does this Plantronics, monaural, noise cancelling headset, model HW251n (H251n?), item 568903 need to connect to the Panasonic wireless expansion headset model KX-TGA9 39T (DECT 6.0)?
Sorry to ask such an ohmigod! question, but you can save me days of talking to puzzled clerks who know lots about office supplies but not the nitty-gritty about how Plantronics plugs into Panasonic. Hampton DeJarnette