PNET1GB and PNETR6 both protect wires 1-8 on an RJ45 cable
PTEL2 and PTEL2R both protect wires 1-4 on an RJ11-, or wires 3-6 on an RJ45 cable
PDIGTR protects wires 1-8 on an RJ45 cable
PS9-DCE and PS9-DTE both protect wires 1-9 on a DB9-RS232 cable