Just a suggestion, fit the 7400 with a static IP if it doesn't have one, give it to Samsung and say, "Now the ball is in your court."

As technicians we are supposed to install and maintain equipment on a NORMAL level.

The 7100 has bugs a plenty, this is not your mother's 1A2 key system and the 7400 has infinitely more places for bugs to be hiding.

Samsung has to understand that when they build something this complicated, there will be bugs and having THEM figure it out is THEIR responsibility.

This is not a case of some tech being inexperienced and not knowing how to set up a toll restriction table, this is BUG work and Samsung does not issue training or certificates saying you are now equipped to do BUG work on machine code.

Drop the responsibility for this on their laps with the Static IP numbers. They have event recorders they can hook up via web or deliver to your doorstep for connection.

MOST LIKELY what will be required to SOLVE this is an event recorder either on site or over the web if possible.

THE Bracha, old blond specialist in Rube Goldberg solutions.