The fundamental principle of any telecommunications network is to allow calls originating from a subscriber A to reach a subscriber B, whether on the same network or on another network, commonly known as "any to any connectivity". In more technical terms, traffic, originating from Subscriber A is terminated at a point of destination, Subscriber B, and in order to allow for traffic to be routed and terminated between different operators, "interconnection" must be established. Interconnection allows for calls placed by a subscriber in one network to reach a subscriber in another network. Such a call is "terminated" in the destination network.