Cisco IP Phone 7945G - Manual (Page 90)

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Troubleshooting Your Phone
This section provides troubleshooting information for your Cisco Unified IP Phone.
General Troubleshooting
This section provides information to help you troubleshoot general problems with your phone. For
more information, see your system administrator.
Symptom Explanation
You cannot hear a dial
tone or complete a call One or more of the following factors might apply:
• You must log into the Extension Mobility service.
• You must enter a client matter code (CMC) or forced authorization
code (FAC) after dialing a number. (SCCP phones only)
• Your phone has time-of-day restrictions that prevent you from using
some features during certain hours of the day.
The Settings button is
unresponsive Your system administrator might have disabled on your phone.
The phone screen
appears blank The phone screen has gone into sleep mode to save power after a period of
inactivity. Wake the phone screen by lifting the handset, or by pressing any
button, such as
. See Cleaning and Maintaining the Phone
Screen, page 16 .
The phone screen does
not illuminate under
any circumstances You might have disabled phone screen illumination on your phone.
Contact your system administrator to determine if this feature is available
to you.
The softkey that you
want to use does not
appear One or more of the following factors might apply:
• You must press more to reveal additional softkeys.
• You must change the line state (for example, go off-hook or have a
connected call).
• Your phone is not configured to support the feature associated with
that softkey.
Barge fails and results
in a fast busy tone You cannot barge an encrypted call if the phone you are using is not
configured for encryption. When your barge attempt fails for this reason,
your phone plays a fast busy tone.