Most reports on ECHELON focus on satellite interception. Testimony before the European Parliament indicated that separate but similar UKUSA systems are in place to monitor communication through undersea cables, microwave transmissions, and other lines. The report to the European Parliament points out that interception of private communications by foreign intelligence services is not necessarily limited to the US or British foreign intelligence services. The role of satellites in point-to-point voice and data communications has largely been supplanted by fiber optics. In 2006, 99% of the world's long-distance voice and data traffic was carried over optical-fiber. The proportion of international communications accounted for by satellite links is said to have decreased substantially to an amount between 0.4% and 5% in Central Europe. Even in less-developed parts of the world, communications satellites are used largely for point-to-multipoint applications, such as video. Thus, the majority of communications can no longer be intercepted by earth stations; they can only be collected by tapping cables and intercepting line-of-sight microwave signals, which is possible only to a limited extent.