{TAIL ~ An inband signaling modem} communicates digital data over {HEAD ~ a voice channel} of a wireless telecommunications network 
{ TAIL ~ An inband signaling modem } communicates digital data over { HEAD ~ a voice channel } of a wireless telecommunications network
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH