a transmitter module disposed within the transmitter module housing, the transmitter module having an electrical to {HEAD ~ optical converter} for converting an electrical drive signal into {TAIL ~ an optical signal} 
a transmitter module disposed within the transmitter module housing , the transmitter module having an electrical to { HEAD ~ optical converter } for converting an electrical drive signal into { TAIL ~ an optical signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL