Panasonic KX-T336200 Installation Instructions Manual page 202

Error Message No.
Attempting to remove an extension or trunk port Cancel the PFT assignment of the
141
which is registered in Power Failure Transfer
Impossible to change the Numbering Plan to
150
"Fixed," because there exist DN's which should
be blank in the "Fixed" mode in the Hundred
Block.
160 Impossible to change IClWPaging group, for the Change after deleting all the extensions in thy
pickup group belonging to the KM/Paging
group contains extensions.
Probable Cause Countermeasure
corresponding card, and then delete the port.
Clear DN's which should be blank.
pickup group.