Abstract: Disclosed are schemes for selecting an interexchange telephone call carrier, selecting a route to the selected carrier, and establishing a call path on the selected route to the selected carrier in a multicarrier environment. Call path establishment from an end office at which a call is originating to the carrier's office is accomplished via a multifrequency signaling scheme. If the call is an international call or the route is an indirect route to a carrier via an access tandem, following seizure of a trunk the end office outpulses thereon a first sequence of information that characterizes the subsequent route that the call should take, including identity of the interexchange or international carrier. After receiving a wink responsive to the first sequence, the end office outpulses a second sequence. If the call is a domestic call routed directly to a carrier, following seizure of the trunk the end office begins outpulsing with the second sequence.