The bt converse 1300 is fully pbx working has 100 name and number memory on hook dialling call timer access code and secrecy it also operates from battery powersennheiser cc 510 monaural headset personal standards at work demand professional means of communications this monaural headset features a temple pad and is specifically designed for call center use features such as ultra noise canceling reduce ambient sound and make conversation clear and intelligible active anti shock in ear pi