LONDON--(BUSINESS WIRE)--International bandwidth infrastructure services provider Zayo Group Holdings, Inc. (NYSE:ZAYO) today announced an extension of its 100G wavelength network, rolling out 100G lineside capability across its metro network in London, Amsterdam, Frankfurt and Paris. The project, completed at the end of the first quarter of 2015, is a move towards a fully integrated, seamless long haul platform. The enhancement involves the consolidation of a large number of legacy point-to-po