Will setting a PBX up with 2 customers instead of 1 allow you to prevent calls from certain DN's on customer 0 from calling dn's on customer 1? If so, do you have to build a seperate data block in load 15 for each of the customers? I only want the second customer to be able to call another DN with the same customer number. This is a training situation where I will have only three telphones and they will only call between each other. Customer 1 will have no trunks.