1. Product Overview¤Cord allows you to plug-in the GN 2100 series headsets directly into AT¤&T, Lucent, Callmaster V, Callmaster VI and 500 AM Cisco 7900 Series¤telephones. Also used to connect GN Netcom headsets with Plantronics M10¤or M12 amps.¤ 3. ¤End-user to contact the vendor in the first instance, repairs and faulty¤ replacements handled direct. 09 368 5639 or 029 222 5531