The telephone set 2 wherein said self regulation means comprises {HEAD ~ means} for controlling the degree of {TAIL ~ attenuation} of the first attenuator of the respective channel 
The telephone set 2 wherein said self regulation means comprises { HEAD ~ means } for controlling the degree of { TAIL ~ attenuation } of the first attenuator of the respective channel
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH