How many networks still run SONET at this point? Most global carriers would run OTN over DWDM at 25GHz or 50GHz spacing, with up to 200Gbps per channel. There i

How many networks still run SONET at this point? Most global carriers would run OTN over DWDM at 25GHz or 50GHz spacing, with up to 200Gbps per channel. There is of course OTN encryption though