This answer is a bit late for giuliana orme, but maybe someone else has this problem.
Most Panasonic phones have a switch on side of phone labelled "Dec/Tone" or "Pulse/Tone". A lot of "Can't dial faults" are that this switch has been bumped to the DEC or Pulse position. Ensuring it is in TONE position fixes most problems.
Chris J
November 2006
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