![](/images/new-backgrounds/1257436/257436203x1.webp)
Terms you should know
Primary directory number
The main extension number on your telephone.
Programmable line (DN)/feature keys
The six keys located at the sides of the upper area of the display.
Quit key
A fixed key on your telephone that is used to exit applications.
Secondary Directory Number
A second incoming/outgoing line for your telephone.
Services key
A fixed key used to access options.
Soft keys (self-labeled)
A set of keys programmed by your system administrator. These four keys located directly below the display area have four programmable layers.
Speaker key
A fixed key used to activate Handsfree.
Status messages
A message displayed to inform the user of important information. A right arrow appears if more than one Status Message is present. Examples of Status Messages include: Message Waiting, All Lines Forwarded to: 6453, Do Not Disturb On, Ring Again active, Ringer is OFF, and Line x Unavailable.
Volume control bar
A rocker bar you press to increase or decrease the volume of the ringer, handset, headset, speaker and the Handsfree feature.
102