simple answer: you need more bandwidth - that is, a faster internet connection at your workplace. specifically, you need a faster *upstream* speed, the speed at which the remote dvr can *send* the data.
mp cameras like jakesoundels suggests are great for high-quality local viewing and recording, but they won't solve the problem of remote viewing; in fact, if your upstream is too slow, the higher data rates will only make the problem worse.
first step is to check with your isp about packages with faster upstream speeds *for your business*.
we just upgrade the circuits to 12 mb and it's 8 mgb upload in the speed test at the rest of the computer ? do we need to change and give more "power" to the specific IP of the dvr ? like raise the upload speed for that that might help ? but it is a swan dvr kinda simple version ? what is more important in this case the dvr ? the cameras ? or the internet connection ? like which trigger is more important ?