Since the launch of Infiniband long haul, we have switches which can communicate till 40KM, but what we want to send data beyond that range?
the datasheet for metro 3X mentions that it is dependent on DWDM for the long haul connectivity, so in theory if DWDM can extend beyond 40KM the 3Xc range can also be increased?
I can say for sure about this. You may need to contact the Nvidia Sells team for this.