The Plantronics 86007-01 is a telephone Interface cable for CS500 Series Wireless Headsets Systems. It's 4-pin modular end plugs into handset port or headset port of desk phone while RJ45 end plugs into front of MDA200. The telephone handset plugs into middle of the cord.
2 year return warranty on headsets. End user to return any faulty product via the online After Sale Service option available at the support section of www.plantronet.com. Call 0800 410014 for further details