With SMPF, the non-incumbent service provider could purchase wholesale the voice service provision from the PTT/ILEC to allow the former to control the customer relationship for both broadband and voice services. In the UK at least, this service is called Wholesale Line Rental (WLR).
With SMPF, the non-incumbent service provider could purchase wholesale voice service provision from the PTT/ILEC to allow the former to manage customer relationships for both broadband and voice services. This practice is known as Wholesale Line Rental (WLR) in the UK.