Voistek All in One Quick Disconnect QD Smart Cord PL1200 for Plantronics Telephone Headset Connects to Nortel Toshiba Avaya Panasonic Cisco NEC and Other Office Hard Phones (SC100) 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 Headset 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, NO HEADSET INCLUDING IN PACKAGE. Universal Compatible Smart Cord, Simple 8-position slide adjustment & Standard RJ connector, Connects to 90% desk phones using a standard modular plug. ONE FOR ALL replacement of Plantronics A10, U10, U10-SE, U10P, U10P-S, HIC and HIP Headset adapter 8-position configurations: 1 Standard (most common) M-, R, R, M+ 2 Cisco IP phones 79xx series R, M-, M+, R 3 Ascom offce and Philips phones R, M+, M-, R 4 Japanese phones, NEC, Nitsuko M+, R, R, M- 5 PLT Vista Base R, R, M+, M- 6 Panasonic phones with modular plug M+, R, R, M- 7 Nortel digital phones and Avaya IP phones M-, R, R, M+ 8 Avaya Callmaster V and VI, Cisco R, M-, M+, R