I have a customer with a NEC SV9100 (School) with 100 Pair outside cable between two building with lightning protection on both ends its been there probably from the beginning They are both grounded looks like the same modules on each end
489BCB1-100 Comcode 107895112 Lucent Technologies

There has been (2) separate incidents (1) this year which blew out (2) digital station cards and (1) last year that blew out (1) digital station card


They also had some data equipment that got hit as well (Last Year)


I notice that the NEC cabinets are not grounded so I was going to do that I just wondering if the right lightning protection is installed since its been their for a while