Replacement cable that connects from the Plantronics CS50 or Avaya AWH-55+, or Avaya AWH-54 base to your office telephone. This cord has two modular RJ9 plug and dual filters on both ends. 36" in length.  part# 66291-01

Note: if you have other Plantronics Wireless Headsets (CS series), you can order the regular base cable part# 65111-01