72 OL-12459-01
 
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 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.
Join fails (SCCP phones 
only)
Join requires multiple selected calls. Be sure that you have selected at least 
one call in addition to the active call, which is selected automatically. Join 
also requires the selected calls to be on the same line. If necessary, transfer 
calls to one line before joining them.
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.
You are disconnected 
from a call that you 
joined using Barge
You will be disconnected from a call that you have joined using Barge if the 
call is put on hold, transferred, or turned into a conference call.
Cisco CallBack fails The other party might have call forwarding enabled.