NEC ND-71762(E) Telephone User Manual


 
ND-71762 (E) CHAPTER 8
Page 101
Issue 2
MAINTENANCE PROCEDURE
(5) Diagnostic Work
START
END
Turn ON the MBR key on the CCH/CCT card, and then set the MB key ONOFF.
System Message 13-F is FAULT : CCH/CCT circuit card is faulty.
displayed again.
System Message 13-F is FAULT SUPERVISION
not displayed.
Paragraphs 3.3 or 3.4