The term "harmonize" is regulalry abused. The closest you can come to a definition is that you try and make things compatible. If you try and make compatible the standards of different infrastructures, the closest you can come to it is by listing all the features that are common for all the infrastructures and than provide exeptions for the features that are not common.
In the days that we had AT&T, UNITED, GT&E, CONTINENTAL etc. etc. networks in North America, they all were different. Those of us involved in writing the standards for that era are very much aware of those differences. We somehow accommodated them in the standards we wrote and over time, persuaded the operators of those networks to converge on a set of common requirements. We started about 15 years earlier than the Europeans, so give them a break. Ciao, Vic
