Carrier specific routing for international switched transit service

This paper presents a new network routing architecture for transit providers to allocate international switched transit service (ISTS) calls to a destination country based on the routing preference of the originating carriers. The new routing architecture is named carrier specific routing for international switched transit service (ISTS-CSR). An originating carrier would be able to specify its routing preference and traffic distribution pattern of its transit traffic to any given receiving country. Upon receipt of an international transit call, an originating switch of the transit provider would access a programmable database and retrieve the routing instruction specified by the originating carrier for the terminating country. In this manner, a terminating carrier can be selected to receive the transit call based on the routing preference previously specified by the originating carrier.