I will try to describe this the best that I can. We have several 3CX systems. We want to decalare on of the 3CX systems as the Master to all the child 3CX (aka Slave) So System A is the Master in the Bridge Connection. System B is the First Slave and uses 4 Digit Extensions.. Registered to the master as 14910. System C is the Second Slave and Uses 3 Digit Extensions... Register to the master as 14920. at System A we created outgoing the following rules.. Prefix 75 w 5 Digits Routes to System B. (Strip 1 Digit..Leaving 4 Digits passing to System B) Prefix 40 w 5 Digits Routes to System C. (Strip 2 Digits.. Leaving 3 Digits passing to System C) at System B and System C we create outgoing rule... 5 Digits Routes to System A. Here is the problem.. When caller from System B dials someone on System C. They name is passed thru correctly to System C but the number is always referenced as 14910. Even if we put a Five Digit number on the CID of the extension.. Person at System C still sees 14910.