A locking terminator device for a coax cable port is used for preventing ingress of electrical signals into the port and also to prevent theft of cable signals by non-subscribers. In some embodiments, a first computing system receives a credential from a browser on a second computing system, determines whether the credential is valid, generates a string of numeric characters, associates the string of numeric characters with the credential, and sends the string of numeric characters to the second computing system. Once the underlying problem is determined, the parts and estimated repair time needed to repair the problem is determined. A shutter layer receives the time from the clock circuitry and modulates the plurality of directional lightbeams to generate a 3D time view. One end of the third signal line is connected to the ground electrode though a via.