the circuit as shown in fig8 the tvs devices 310 are connected along the lines 307 connecting the common mode chokes 300 and the contacts 270 fig9 is a schematic diagram illustrating a fifth embodiment of applicant 39 s invention this embodiment protects against both esd and differential voltages the circuit is similar to that shown in fig6 and 7 combined eight transient voltage suppression tvs devices 310 a are each connected in series with one inductor 311 a causing the tvs devices 310 a to be inductively coupled to the circuit as shown in fig9 the tvs devices 310 a are connected along the lines 307 connecting the common mode chokes 300 and the contacts 270 four transient voltage suppression tvs devices 310 b are each connected in series with one inductor 311 b causing the tvs devices 310 b to be inductively coupled to the circuit as shown in fig9 the tvs devices 310 b are connected along the lines 303 connecting the center tapped autotransformers 302 to the contacts 271 this shows that esd and differential protection can be combined fig1 is a schematic diagram illustrating a sixth embodiment of applicant 39 s invention this embodiment protects against both esd and differential voltages and does not include the filtering elements this circuit contains only one signal pair 320.