The unused branch of the T is usually left with no device connected to its end, thus has no electrical termination.

The purpose of electrical termination is to minimize the effects of signal reflections that can cause waveform distortion.

The DOLLx8 bus works with five logical signals at 5 volts each, where the bus-line requires resistors as electrical termination (terminator) of 120 ohm.

Electrical termination of a signal involves providing a terminator at the end of a wire or cable to prevent an RF signal from being reflected back from the end, causing interference.