A primary/secondary surge protector circuit for protecting {HEAD ~ telecommunications equipment} from {TAIL ~ power and surge transients} includes a printed circuit board and a surge protector circuit 
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A primary / secondary surge protector circuit for protecting { HEAD ~ telecommunications equipment } from { TAIL ~ power and surge transients } includes a printed circuit board and a surge protector circuit
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH