Voistek 66267-01 Quick Disconnect QD to RJ Call Center Telephone Headset Adapter Cable Coiled for Plantronics Headset to Avaya Nortel Polycom Siemens Nec GE IP Phones (33305-02 66268-01 PQDRJA10) Not sure about your phone compatibility? See part of compatible phone models listed below in Product Description. Still can't find your phone model? Just get FREE HEADSET EXPERT HELP or ADVICE by CONTACTING US. This Cable is Compatible with most standard Telephone with RJ Headset port such as Aastra Avaya GE Mitel NEC Nortel Plantronics Siemens Toshiba...etc. Works with Plantronics H/HW series. VXI P series, Smith Corona P Series, Starkey PL Series, The One Headsets Quick Disconnect allows you to disconnect from your headset without losing your call No Headset included in Package