Hello NEC Experts
I have an old Neax 2400 SIM pbx consisting of 2 PIMs.
Suddenly the opertors complained that most of the extensions are not working.testing the pbx proved that 124 extensions were faulty in 12 PA-16LCH cards as follows:
some no dial tone, others no ring,
all CO lines and attendant console were found ok . NO signs of burning out on cards were observed.
any idea on this abnormal situation.
