The Plantronics 84757-01 Panasonic PSP EHS Cable is a new electronic hookswitch solutions for Panasonic desk phones. 
 
 
 
FEATURES
 
 
 
? Compatible with these Panasonic Model:
- KX-UT133/136
- KX-UT670/248
- NT553 & NT556 
- KX-DT543
 

? For use with current Plantronics Headset models in the CS500 & SAVI700 ranges