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1 0 / 0 6 • 1 0 2 5 8 8 B E TrueNet®Structured CablingTechnical Reference Singlemode versus Multimode Optical FibreOptical fibre cable comes in two varieties: singlemode and multimode. Both have applications in structured cabling systems. Singlemode optical fibre cables transmit a single ray of light used to carry modulated signals. It is normally used in applications requiring the transmission of signals over a long distance, for example, between separate facilities on a campus.Multimode optical fibre cable carries multiple light rays with different reflection angles within the fibre core. With a fibre core that’s thicker than singlemode optical fibre, multimode optical fibre is better suited for short runs, such as those between equipment and panels. Multimode should be used to connect devices such as optical routers and servers.Optical fibre cable offers a level of security that exceeds copper or microwave transmission because it is difficult to tap into without breaking.Ultra Physical Contact Connectors and Angled Physical Contact ConnectorsAttaching a connector to an optical fibre cable will cause some of the light traversing that optical fibre to be lost. Regardless of whether the connector was installed in the factory or the field, its presence