Plantronics U10P-S Headset Cable, coil cord to QD modular plug U10P-S cord Only works on certain phones listed under product descritpion**READ FULL PRODUCT DESCRIPTION BELOW PRIOR TO ORDERING**SPECIFIC FOR SNOM, YEALINK, ZULTYS, GRANDSTREAM PHONESThese are U10P-S CORDS, NOT the same as U10P cords|This is the bottom cable that connects Plantronics H/HW Series Headsets to these specific telephones: Grandstream GXP1200,1400,1405,1450,2010,2020,2100,2124Huawei ET325Huawei ET525Snom 320,Snom 360Snom 370Snom 820Snom 870Yealink