Standard Ports
Standard ports are when the range holder (RH) and the losing comminucations provider (LCP) are the same.For example, if ther Range holder is BT and the LCP is also BT this is a Standard Port. Lead times are quicker as only one party is involved in the port.
Subsequent Ports
Subsequent ports are when the range holder (RH) and the losing comminucations provider (LCP) are different.For example, if ther Range holder is BT and the LCP is Virgin this is a Subsequent Port. Lead times are longer two parties are involved in the port.