The switchboard is usually designed to accommodate the operator, who sits facing it. It has a high back panel, which consists of rows of female jacks, each jack designated and wired as a local extension of the switchboard (which serves an individual subscriber) or as an incoming or outgoing trunk line. The jack is also associated with a lamp.
tHE SWItchbOaRD IS usually desiGnEd to acCOmmoDAte the operatOr, Who SIts faCiNg IT. it Has a high bAcK PAnel, whIcH ConsisTS Of RowS oF fEmalE jaCkS, EAcH JAck designAted aNd wired as A locAl ExtEnsIon OF The switChBoard (whicH SErves aN indiViDUal subSCriber) or As an InCOminG or oUTgoiNG tRUNk LiNE. ThE jacK is also associaTEd with a lAmp.