In view of the large-amplitude and low-frequency jitters induced by pointer adjustment at the boundary between SDH and PDH networks

a sequence modulation-based adaptive jitter suppression scheme is presented on the basis of the existing research results.Adopting bit leakage cycle adaptive modulation based on statistical prediction combined with buffer storage monitoring

it can effectively avoid buffer storage overflow caused by the operating mode changes of networks with the same polarity.The design principle for implementing sequence modulation is given and the bit leakage cycle and sequence modulation time in both normal and degraded modes calculated.Simulation and practical applications have shown that by this scheme pointer adjustment jitters can be easily and effectively suppressed.