
126APPENDIX A: TELEPHONE INSTALLATION AND MAINTENANCE
Cleaning Your | Always unplug your telephone from the power source and from the | 
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Telephone | network before you clean it. Use a soft cloth dampened with mild  | 
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  | detergent.  | 
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  | WARNING: Failure to unplug the telephone before you clean it could  | 
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  | result in electrical shock.  | 
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Troubleshooting | Table 13 lists possible problems that you may encounter and the most  | 
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Problems | likely solutions. Where possible, each solution refers to the section in this  | 
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  | guide where you can find detailed information. | 
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  | Table 13 Possible Problems | 
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  | Possible Problem | Suggested Solutions | 
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  | My telephone has no dial  | ■ Verify that the power cord is fully inserted in the  | 
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  | tone and the display panel  | correct connector on the underside of the  | 
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  | is blank.  | telephone. Use the strain relief tab to prevent the  | 
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  | cord from becoming unplugged.  | 
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  | ■ Verify that the Ethernet cables are connected and  | 
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  | that each cable is in the proper connection.  | 
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  | ■ Remove and add power to the telephone by  | 
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  | unplugging the power cord at the electric outlet  | 
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  | and plugging it back in.  | 
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  | ■ If the telephone is powered through a powered  | 
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  | Ethernet cable, make sure that power is applied to  | 
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  | the cable at its source.  | 
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  | My telephone has “locked  | ■ Your telephone has lost the connection to the  | 
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  | up.”  | system. Remove the Ethernet cord from the jack,  | 
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  | and then   | 
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  | ■ Wait a few seconds. If the telephone display panel  | 
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  | still appears to be locked, disconnect the electrical  | 
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  | power for your telephone, and then plug it back in.  | 
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  | Callers cannot leave  | Your mailbox may be full. Log in to your voice mailbox  | 
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  | messages on my voice mail.  | and delete some messages.  | 
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  | When I dial 9 or 8 to access  | No outside lines are available. Try again in a few  | 
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  | an outside line, the display  | minutes.  | 
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  | panel shows “All Ports  | 
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  | Busy.”  | 
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After I call another user in my organization, I hear a tone but no ringing.
The other user may have the Hands Free feature enabled. Begin speaking after you hear the tone. For details, see Using the Hands Free Feature.