As contractors linked the main comms with 3 sub-comms location with OM3 fibre I configured main switch Netgear GS728TS using three transceivers Netgear AGM731F, configured switches that will be used on it other end ( GS110TP) and then connected everything to fibre patch panel. Well nothing is happening. I tested both cables I am plugging to fibre patch panel - all fine, transivers are fine either. I got back to contractors but they are quite convinced that all should be fine. Is there any diagnostics, checks, test I can run to check if cabling is flawless ? I dont want to force them to site if there is something tiny and obvious preventing connectivity.
Assuming that you can log into the managed Netgear switches you should be able to use the internal utility to get information about the relevant ports. See Page 256 of the linked switch software admin manual.
You should be able to get much more detailed information about the relevant ports like their physical status, etc using the management interface from Netgear. If the fibre cables you mentioned are using the SFP ports you may want to verify that the cables are compatible with all interconnected networking equipment, some may not be.