I've read a bit into Gatekeepers and zone prefixes. I understand that when a gateway registers with a GK, its voip dial peers auto register with the GK, unless you have the number xxxx no-reg in the ephone-dn. Im getting confused around the what the actual zone prefix does since the GK has a list of all the voip DN's anyway.
Is it some type of summerisation for the GK to advise other GKs or GWs that it holds all the number for the range xxxx?
Any light shed would be much appreciated.