. "Toll-Free_Telephone_Number"^^ . "Toll-Free Telephone NumberPTNCI" . "Toll-Free Telephone Number"^^ . "Toll-Free PhoneSYNCI" . "Toll-Free Phone NumberSYNCI" . "C1710431"^^ . "A special telephone number in which the calling party is not charged for the cost of the call. Instead, the called party pays all of the charges for the call.NCI" . "Toll-Free Telephone Number"^^ . . "Conceptual Entity"^^ . "Toll-Free NumberSYNCI" . "C43413"^^ .