This is the Plantronics APD-80 EHS cable compatible with Grandstream GXP2124, GXP2130, GXP2135, GXP2140, GXP2160, GXP2200, GXV3240, GXV3275 , ShoreTel (Mitel) IP 480, IP 480G, IP 485, IP485G, IP655 phones.  Allworx Verge 9304, 9308, 9312. Designed to be used with these Plantronics wireless headsets:

Plantronics CS540, CS510, CS520 , Plantronics Savi WO100, Plantronics Savi WO200, Plantronics Savi WO300 Plantronics Savi WO350 , Plantronics Savi W740, Plantronics Savi W710 , Plantronics Savi W720 , Plantronics Savi W730 , Plantronics Savi W745

Notes:

• Grandstream phones require firmware 1.0.4.23 or higher
• Select the APD-80 EHS by going to Menu > Config > Headset Type > Plantronics EHS
• Use a Plantronics 85638-01 cable to extend ADP-80 audio input to reach the headset jack on the Grandstream phone.