The TOA T-12S is an Unbalanced Line Input Module with Music-On-Hold Output and Input Mute-Receive.
The TOA T-12S is for use with unbalanced, line level equipment. Transformer-isolated output of module’s input signal for feeding remote equipment such as mixers, amps, tape recorders & telephone system music-on-hold inputs. Responds to mute bus activation (output uninterrupted).