I hope you just don't look at it. Pls do let us know what corrective action has been taken. As your customers it is our right to know how such thing will not be repeated, i.e. the no or delayed communication part and not the core technical glitch part, that can still happen for reasons beyond your control.
It is easy for all of us (us the clients and you) to forget once things start running smooth. Hence we would appreciate if you could revert about your findings why SMS were not delivered before market opening (I too got it at 10:30 am, buy that time the entire world knew about it). Why not even a single broadcast messages appear on NEST terminals. Till then I logged off the NEST twice, rebooted the machine once and then decided to call you. I saw messages on the web version later though.
Instead of creating a short strangle which I had earlier plannned, I for that matter closed my last week carried forward short 1000 Nifty CE8800 for a small profit at EOD today. Twice bitten than shy. Cant risk having even a hedge position like a short strangle tomorrow without having any control i.e. just incase if today's issue had to happen tomorrow again.
Pls remember "communication is the key". Hope you updated all with your findings, plan b and assurance that such massive downtime will be handled well.
On a lighter note, we too have fatter pipes and know where to put them just in cases of repeat instances like these. ;-)