Each modem includes a transmitter section for transmitting {HEAD ~ data} and a receiver section for receiving data, and is of the discrete multitone type, i.e., the modem transmits {TAIL ~ data} over a multiplicity of subchannels of limited bandwidth 
Each modem includes a transmitter section for transmitting { HEAD ~ data } and a receiver section for receiving data , and is of the discrete multitone type , i.e. , the modem transmits { TAIL ~ data } over a multiplicity of subchannels of limited bandwidth
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH