Amplified bottom cable to fit the Avaya 6400 and 8400 telephones, the HIC 1 cable can be used on the handset port of the following models- Avaya 6402/6408/6416/6424/8403/8410/8434, it can also be used directly in the headset port of the following models - 6424 M/6416D M
2 year return warranty on telephones. End user to return with proof of purchase to Service Department, Plantronics Ltd, Interface Business Park, Binknoll Lane, Wiltshire. SN4 8QQ. Call 0800 410014