What is the difference between a shielded and unshielded modular coupler?
A Shielded Coupler is encased in a metal structure allowing it to ground to a metal wall plate or panel; an Unshielded Coupler is not. A shielded coupler would be required when using a shielded cable terminated with a shielded plug. The shielded plug would tie the shield to the coupler, thus grounding it as well as passing it on to the shielded cable assembly plugged into the other side of the coupler. Because of this, a shielded coupler is only required if you are using shielded cable assemblies. If the cable assemblies you are using do not have shielded plugs then you do not need a shielded coupler.
