Panasonic KX-TG2448BXF Service Manual page 33

8.1.3. Test Link Mode
Note:
(*1) When you check test mode, connect to the external Buttons because Base Unit has only LOCATOR key. Refer to "For Test
Mode" in Base Unit Reference Drawing (P.40). -Insert AC adaptor during checking.
(*2) for factory use only
(*3) Refer to Check Table for RF part (P.26) and Test Link Mode (P.37) for proper Handset Settings.
KX-TG2448BXF / KX-TG2448BXS / KX-TGA254BXF / KX-TGA254BXS
33