1. A system for processing telecommunications billing outsourcing comprising a first processor operating to: issue one or more first billing statements and one or more second billing statements; and transmit the one or more first billing statements to a second telecom network; wherein the one or more first billing statements reflect one or more charges from a first telecom network to the second telecom network; wherein the one or more second billing statements reflect one or more charges from the second telecom network to one or more customers thereof; and wherein the first and second telecom networks are separated by at least one firewall.