JDSU testers for network elements and systems provide industry-best performance and functionality via modular test platforms with the vital features needed to test transport rates and data frames to verify proper operation. JDSU network element and systems test features include BERT and overhead analysis, Jitter and wander measurements, multi-channel service disruption testing, mapping and emulation (OTN, VCAT, LCAS, and generic framing procedure [GFP]), and multiple Ethernet generation and analysis in parallel streams.