RJ45 PLUG TO BT SOCKET PABX MASTER LINE ADAPTER UNIT TELEPHONE CONVERTER
LAU PABX master adapter cable balun, 6 way BT socket to RJ45 plug. PABX Master - mastered without surge arrestor. BT 6 Way 631A Female socket to RJ45 Male plug. Types of line adapter unit (LAU). Master - mastered with surge arrestor.