It is necessary, as regards calling line identification, to protect the right of the calling party to withhold the presentation of the identification of the line from which the call is being made and the right of the called party to reject calls from unidentified lines.
Kar zadeva identiteto kličočega, je treba zaščititi pravico klicatelja, da zavrne prikaz identitete priključka, s katerega kliče, in pravico poklicanega, da zavrne klice z neprepoznanih priključkov.