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This application note discusses the various challenges of CWDM testing during construction, installation, activation and troubleshooting phases; it also presents specialized testing equipment.

This application note discusses in-band optical signal-to-noise ratio (OSNR) testing, more specifically when there are several ROADMs in a network.

This application note examines the basic technical aspects of MPLS and the testing needs associated with deploying and maintaining such a network.

This article presents how to measure polarization dependence of DWDM passive devices with the IQS-12004B DWDM Passive Component Test System.

This article shows the importance to perform reliability testing in order to determine the long-term behavior of passive components.

This article simplifies polarization mode dispersion, using specific examples and formulas.

This application note presents EXFO's powerful tool that simplifies the field engineer’s turn-up and troubleshooting activities for SONET/SDH networks, removing the complexity associated with these ne...

This application note presents EXFO's instruments for in-service PON troubleshooting.

This application note highlights the differences between the differential phase-shift method and the phase-shift method.

This paper provides background on the different topologies used to deliver Ethernet services, their corresponding test methodologies and the selection of the appropriate test mode according to the top...