Thank you a lot for your answer, I've done some more researches using informations you gave and now I understand this better.
Also while talking with both suppliers, I've learnt that the first one was talking about Series as Series (not generation as I was thinking), and was the one the gave us...
Hello there,
First of all I hope you're all having a good day.
I was asking different suppliers for quotations for my video surveillance system that I wish to install in one of my warehouses in France and while talking to the first one giving him a list of my needs to get recommandations on...