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The stm satu synchronous transport module level is the sdh itu t fiber optic network transmission standard. it has a bit rate of .dua mbit s. higher levels go up by factor empat at time other currently supported are stm , stm enam stm empat and stm ..
O modulo de transmissao sincrono stm satu e o quadro basico usado na do sistema sdh da recomendacao itu t fiber optic network transmission standard.ele utiliza uma taxa bits ,dua mbit sendo equivalente ao sinal oc tiga sonet..