This is the Plantronics APD-80 EHS cable compatible with 

Grandstream GXP2124, GXP2130, GXP2135, GXP2140, GXP2160, GXP2200, GXV3240, GXV3275, GRP2612, GRP2612 GRP2613 GRP2614 GRP2615 GRP2616, 

ShoreTel (Mitel) IP 480, IP 480G, IP 485, IP485G, IP655 phones. 

Allworx Verge 9304, 9308, 9312.

NEC DT820: DTZ-12, DTZ-32, ITZ-12, ITZ-24, ITZ-32, ITZ-8LD, IT-6D, ITY-8LDX, ITY-6D 

NEC DT920:  ITK-6D-1P, ITK-6DG-1P, ITK-12D-1P, ITK-12DG-1P, ITK-8LCX-1P, ITK-32LCG-1P

Designed to be used with these Plantronics office wireless headsets

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.

Old Poly part # 87327-01

New HP part # 85Q58AA