176GlossaryTo help you understand the main technical termsand abbreviations used in this booklet, and to takefull advantage of the features of your mobile phone,here are a few definitions:Active sliderAbility to answer a call simply by opening thephone.Call barringAbility to restrict outgoing and incoming calls.Call divertingAbility to reroute calls to another number.Call holdingAbility to put one call on standby while answering ormaking another call; you can then switch betweenthe two calls, as required.Call waitingInforms you that you have an incoming call whenyou are engaged on another call.Caller line identification services (Caller ID)Services allowing subscribers to view or block thetelephone numbers of callers.