Why does my Siemens Telephone say 'not available' after dialing?
If your Siemens Telephone displays 'not available' after dialing, it means the phone number was not fully entered, or the star or hash key was not pressed. Ensure you enter the phone number correctly or as prescribed.
What to do if my Siemens IP Phone displays 'Not authorized'?
If your Siemens IP Phone displays 'Not authorized', it means a blocked function was called. Contact the relevant service personnel to request the COS (Class of Service) for the blocked function.
Why does my Siemens Optipoint 420 say 'no access'?
If your Siemens Telephone displays 'no access', it means a blocked function was called. You must apply to the relevant service personnel for the COS for the blocked function.
How to fix Siemens Handsets with no display?
If your Siemens handset has no display, it may not be switched on, or the batteries may be empty. Press the On-hook key until confirmation is received. Charge or replace the batteries.
What to do if my Siemens IP Phone is not reacting to keystrokes?
If your Siemens IP Phone is not reacting to keystrokes, the keypad lock may be activated, or a key might be stuck. Press the hash key until you receive confirmation to deactivate the keypad lock. Also, ensure that none of the keys are physically stuck.
Why can't I hear anything during a call on my Siemens IP Phone?
If you can't hear anything during a call on your Siemens IP Phone, it might be because the 'R key' was pressed, muting the microphone and the receiver. To fix this, press the 'Delete' Display key to reactivate the microphone and receiver.
What does de-crescendo tone during input mean on Siemens IP Phone?
A de-crescendo tone sequence during input on your Siemens IP Phone indicates that an incorrect entry was made. Repeat the key sequence while watching the display, and consult the operating instructions if needed.
What to do if my Siemens Optipoint 420 Telephone shows 'Time exceeded'?
If your Siemens Telephone displays 'Time exceeded', it means the maximum input time was exceeded because the On-hook key was not pressed, and there were long pauses between keystrokes. To resolve this, avoid long pauses when entering information and press the On-hook key.
Why does my Siemens Optipoint 420 Telephone say 'Connect. No dial tone available'?
If your Siemens Telephone displays 'Connect. No dial tone available' immediately after pressing the Talk key, it means calls cannot be made because the communication system is currently in use by other users. Please try your call again later.
What to do if my Siemens IP Phone shows 'Base 1 Outgoing and incoming calls and activation/deactivation are not possible'?
If your Siemens IP Phone shows 'Base 1 Outgoing and incoming calls and activation/deactivation are not possible,' it means that the handset is blocked. To fix this, remove the battery pack from the handset and then re-insert it. Then, proceed as if you were loading batteries for the first time.
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