Designed and engineered in Australia, the ADDCOM Multipurpose (MPS) Switch has been designed to enhance your work day by providing you with greater flexibility and control of your headset and handset. The MPS switch is designed to optimise user flexibility and control by allowing customers to utilise both headset and handset functions, a task prevented by the configuration of some telephone systems. The ADDCOM MPS switch boasts a mute function, a simplified two position polarity switch to ensure compatibility with most telephone systems and external recording options. The MPS switch also has three training modes, this means that two headsets can be plugged into the same telephone with the option of muting either or both headsets. Simplified two position polarity switch, automatically de.