AASTRA 4420 IP Basic (SIP) for MX-ONE User Guide - Manual (Page 69)

69 Dialog 4420 IP Basic
Glossary
Glossary
Call mode The different states your phone is in; calling, ringing,
forwarded, etc.
Exchange Switch. Your telephone switching system.
Idle mode The state your phone is in when nothing is activated; not
calling, not ringing, not forwarded etc.
LAN Local Area Network.
Speed Dialing number Abbreviated number or short number, used for making
frequently used numbers faster to dial.