... UNITNTCF21,FIBER OPTIC COMMUNICATION SYSTEMNTCF22,FIBER OPTIC COMMUNICATION SYSTEMNTCF23,FIBER OPTIC COMMUNICATION SYSTEMNTCL01,COMMUNICATION LINK TERMINATION UNNTCR01 TERMINATION UNITNTCS04,CONTROL I/O TERMINATION UNIT USENTDI01,DIGITAL I ... /O TERMINATION UNITNTDI01-A,TERMINATION UNITNTDI02,DIGITAL I/O TERMINATION UNIT (HOTNTDO02,DIGITAL OUTPUT TERMINATION UNIT ...