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