Panasonic KX-TG5631S - Multi-unit Operation; Intercom Calls

8.2.3. Test Link Mode
Note:
(*1) LCD displays the Channel number.
(exception: default/ CH00 = 1ch.)
(*2) for factory use only.
(*3) Refer to Check Table for RF part (P.33) and Test Link Mode (P.40) for proper Base Unit settings.
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KX-TG5631S / KX-TG5632M / KX-TG5633B / KX-TGA560S / KX-TGA560M / KX-TGA560B