Shows information about your phone such as directory number,
active call, and phone menu listings.
Indicates an incoming call (flashing red) or new voice
message (steady red).
Navigation bar and Select/Feature button
The Navigation bar allows you to scroll through menus and
highlight items. The Select button (in the middle of the Navigation bar) allows
you to select a highlighted item.
When the phone is off-hook, the Select button functions as
the Feature button. You can access these features:
All: Allows you to forward a call.
Mail: Allows you access voice mails.
Pickup: Allows you to answer a call that is ringing on a co-worker's phone.
Pickup: Allows you to answer a call that is ringing in another call group.
Opens or closes the Applications menu. Use it to access call
history, user preferences, phone settings, and phone model information.
Transfers a call.
Places an active call on hold or resumes a held call.
Allows you to dial phone numbers.
Selects the speakerphone as the default audio path and
initiates a new call, picks up an incoming call, or ends a call. The
speakerphone audio path does not change until a new default audio path is
selected (for example, by picking up the handset).
Controls the handset and speakerphone volume (off-hook) and
the ringer volume (on hook).
Toggles the microphone on or off.
Dials the last dialed number.
Returns to the previous screen or menu.
Displays date and time. Also displays line information such
as voicemail and missed calls. When using the Applications menu, displays phone
The format that the phone uses to display dates is set up by your system administrator. The possible formats are:
Day, Month, Year (DD/MM/YYYY)
Month, Day, Year (MM/DD/YYYY)
Year, Month, Day (YYYY/MM/DD)
Line details and other phone information
Displays the directory number. During a call, also displays
details for the active line. If not on a call, also displays line text label
and other information such as placed calls and phone menu listings.
Use the following figure to connect the phone to the network.
DC adapter port (DC 4.2V).
Network port (10/100 SW) connection. IEEE 802.3af power
AC-to-DC power supply (optional).
Access port (10/100 PC) connection.
AC power wall connection.
The Cisco Unified IP Phone 3905 has a foldable footstand.
When the footstand is unfolded, it gives the phone an elevated viewing angle.
Clean the Phone Display
Phone displays that are not touchscreens can be easily cleaned.
Wipe the screen with a soft, dry cloth.
Use only a soft, dry cloth to wipe the phone display. Do not use any liquids or powders on the phone because they can contaminate phone components and cause failures.
Adjust the Handset Rest
If your phone is wall-mounted, you may need to adjust the handset rest to
ensure that the receiver does not slip out of the cradle.
Remove the handset from the cradle and pull the plastic tab from
the handset rest.
Rotate the tab 180 degrees.
Hold the tab between two fingers, with the corner notches facing
Line up the tab with the slot in the cradle and press the tab
evenly into the slot. An extension protrudes from the top of the rotated tab.