One reason that GSM took over the world was because the initial standard defined not just the over the air interface, but the interfaces between all the individual components in the ground network. The point being so you could mix Ericsson base stations with a Nokia controller, and in that way it increased competition between the equipment manufacturers since they had no lock-in.
One reason that GSM took over the world was because the initial standard defined not just the over the air interface, but the interfaces between all the individual components in the ground network. The point being so you could mix Ericsson base stations with a Nokia controller, and in that way it increased competition between the equipment manufacturers since they had no lock-in.