Most of it seems to be about training.
The neighbor had a pro company install his, my son knows a few of the guys that work there.
The dog(s) need to be led up to the line of little white flags showing where the cable is, they need to get the warning, get a shock and associate that with the line of flags (their property line).
They quickly learn that the warning precedes the shock and how far back from the flags they need to be to avoid the shock.
I think the neighbor probably walked the property line with his dog for a couple of weeks, the flags were pulled out after about 3 months.
I can walk my dog past his property and his dog will come out barking at yapping at mine up to maybe 4 ft from the sidewalk. It will follow along the property line like that until we are passed.
My dog seems to have picked up the message that there is a line there that must not be crossed, she doesn't try to go after him.
Supposedly dogs that learn to rush it can be scared to come back in, hearsay from the guys who work the the installers.