Patent ID: 7583697

Claim:
A method for transmitting low speed signals in an Optical Transport Network (OTN), said method being implemented by a multiplexing device, said method comprising: mapping each channel of low speed signal into an Optical Channel Data Unit (ODU) signal at the same grade as that of the low speed signal; byte interleaving each channel of Optical Channel Payload Unit (OPU) payload of ODU signal in each time slot of Optical Channel Payload Unit k (OPUk) payload area of Optical Channel Data Unit k (ODUk) signal; frame interleaving the OPU justification overhead corresponding to each channel of OPU payload of ODU signal in OPUk justification overhead of different frames of ODUk signal; frame interleaving the ODU overhead corresponding to each channel of OPU payload of ODU signal in ODUk overhead of different frames of ODUk signal; transforming said ODUk signal into an Optical Channel Transport Unit k (OTUk) signal and transmitting said OTUk signal in an OTN; wherein the index k represents a supported bit rate and the different versions of OPUk, ODUk and OTUk.