15) “specialized service” means an electronic communications service optimized for specific content, applications or services, or a combination thereof, provided over logically distinct capacity and relying on strict admission control from end to end. It is not marketed or usable as a substitute for internet access service; [its application layer is not functionally identical to services and applications available over the public internet access service;]
And that, particularly if the specialised service uses IP, is the problem?
And end-to-end means to a particular device or, more probably, an end network controlled by the service supplier.
I stopped liking "end-to-end" sometime back.
Gordon