Analyze, test, simulate, and monitor OC-3/STM-1 and STS-1/STM-0 signals. The board can add and drop T1, E1, T3, or STS-1/STM-0 signals to and from an OC-3/STM-1 signal or T1 and E1 signals to and from an STS-1/STM-0 signal. The board can also generate BERT patterns, internally in all framing modes.