endo | exo

exo | endo


microphones_out | loudspeakers_in
loudspeakers_in | microphones_out
microphones_in | loudspeakers_out
loudspeakers_out | microphones_in
microphones_out | loudspeakers_in
loudspeakers_in | microphones_out

microphones_in | loudspeakers_out
loudspeakers_out | microphones_in