[ 137 ]Glossary2222 GlossaryThis section lists various terms and provides definitions.antenna The transmitting device that sends or receives radiosignals to and from your phone.battery The power source for the phone.call forwarding A network services feature you use to forwardincoming calls to another number.call waiting A network services feature that enables your phoneto beep while you are in the middle of a call. Thebeep lets you know that someone else is calling you.caller ID A network services feature that identifies incomingcalls.digital/analogselectionA network services feature that enables you toswitch your phone between digital and analogmodes. This feature is available only for certainphones.electronic serialnumber (ESN)The identification number that is assigned to thephone.home system The system in which your phone works withouthaving to roam.icons Small pictures that appear on your phone’s screenand are representative of something.For example, the icon indicates that you canenter alphabetic text into a specific field.keypad tones See tones.8265_1.BOOK Page 137 Friday, October 19, 2001 3:06 PM