User Guide

Additional features
262
Your IP Deskphone may be configured to perform automatic software
updates. If this feature is configured, the IP Deskphone displays when a
software update is scheduled to occur, and Yes and No context-sensitive
soft keys are displayed. If the IP Deskphone is idle and no key is pressed,
the software update begins in one minute.
If you press Yes, the software download begins.
If you are using your IP Deskphone (this includes on hold, on a
conference call, or when your IP Deskphone is ringing) and you press No,
the call is not disconnected and the software update does not occur. The
IP Deskphone displays the software download prompt again in three
minutes a total of three times.
If, after the third notification, you press No or no key is pressed, the
software update does not occur. Your IP Deskphone attempts the
software download process again in two hours.
Note: If you allow the update to proceed and the server is down, the
IP Deskphone does not ask for updates again.
Busy lamp field
The Busy Lamp Field (BLF) is an alternate presence-monitoring
mechanism for the IP Deskphone that allows presence functionality on
proxies that support BLF.
BLF is an icon state for a corresponding Speed Dial key on an IP phone;
the icon state tells you if another extension connected to the same SIP
server is busy. You do not enable or disable this feature; BLF is
configured by your system administrator. If enabled, the IP Phone
subscribes to the proxy and receives the presence state list for all the
users it is configured to watch. Call states and the corresponding
presence icons are shown in the following table: