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With new ROADM deployment and 10G/40G/100G, there is a shift in the requirements to test CD and PMD in metro areas. Today, CD and PMD testing need to be optimized for both metro and core networks.

This article examines the key technologies and approaches required to reach requirements, especially in the access network, using OFDM, higher-order modulation schemes, advanced antenna technologies a...

Several high-bandwidth networks have recently been upgraded to include ROADMs to improve efficiency and flexibility. ROADMs allow networks to remotely change the amount of dropped or added wavelengths...

As next-gen networks employ ROADM and/or multiple-bit/symbol advanced modulation formats, use of traditional OSNR measurements leads to either over—or under—evaluation of the OSNR.

The growth of data-centric services, along with the growth of the social Internet and multimedia applications, has prompted wireless service operators to shift toward packet-based Ethernet/IP technolo...

Depending on bandwidth requirements and the amount of subscribers sharing the network costs, coarse wavelength division multiplexing (CWDM) has proven to be cost-effective for the ever-increasing mobi...

As the service offering becomes more complex, network engineers and field technicians are required to respond to more troubleshooting service calls that require them to rapidly pinpoint, analyze and r...

The advent of new advanced modulation formats to transport 40 Gbit/s and 100 Gbit/s transmission rates has resulted in numerous publications on polarization mode dispersion (PMD) and differential grou...

SyncWatch-110 and SyncWatch Software qualify and monitor next-gen networks that use Precision Time Protocol, SyncE, and/or traditional TDM synchronization testing technologies.

With BrixCall, providers can effectively manage, troubleshoot and monitor their VoIP networks to provide service-wide visibility and performance metrics. BrixCall constantly monitors the performance o...