Universal RJ9 Headsets - Jabra QD

The solution to a common problem of not being able
to connect headset and telephone. Even though most things have been
standardized, the cord connecting the phone with the handset
or headset is anything but standard as each telephone
manufacturer had its own wiring cord.
This cord will work with virtually any phone
providing great convenience.
• 8-Position select switch — enables you to
  make your corded headset compatible with any telephone.
• Use any phone even if you changed phone.
  Eliminates the need for multiple cords for
  connecting to different phone systems.
• Control michrophone volumn.
  Allows you to increase the volume for optimum call clarity.
  A low-current mic amplifier on switch
  positions 6 through 8 boosts signal gain
  by approximately 12 dB.
• Smiliar to GN1200 Smart cord