In the U. S., telephone jacks are also known as registered jacks, sometimes described as RJ-XX, and are a series of telephone connection interfaces (receptacle and plug) that are registered with the U.S. Federal Communications Commission (FCC).
The cranial nerves can be classified as special sensory, (primarily) motor, or mixed sensory and motor. Olfactory Nerve (N I) The olfactory nerve is a special sensory cranial nerve that is responsible for the sense of smell.
Along with the spinal nerves, the cranial nerves are part of the peripheral nervous system. There are twelve pairs of cranial nerves. Cranial Nerves Involved in Smell and Vision. CN I, the olfactory nerve, is a purely sensory nerve.