Second Draft Determination to resolve Dispute between Opal Telecom and BT about BT’s Average Porting Conveyance Charge

This dispute is between Opal Telecom Limited (Opal) and British Telecommunications plc (BT). It relates to the manner in which fixed line calls from providers other than BT, to geographic telephone numbers which have been ported-out to Opal from BT, are transited across BTs network and handed over to Opal, and how related costs are borne.