Phone regulator Oftel has weighed in and told BT to offer its rivals deals for Flat Rate Internet Access Call Origination (Friaco).
BBC: Unmetered web access in trouble
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As long as Friaco is not "available and useable", ISPs will have to bridge "this unfortunate gap with interim solutions", says Mr Mitchell.
BBC: Unmetered web access in trouble
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Known as Friaco, for Flat Rate Internet Access Call Origination, this charges ISPs for the number of lines they take from BT rather than the amount of traffic flowing over them.