Electrical multiplexing has limited channel capacity as the Ethernet switches can only run at most 10 Gbps. To increase this channel capacity optical multiplexing is required. The OTDM path network has the ability for 100 Gbps Ethernet switching, however more modulators need to be equipped in the transmitters, and only connections from the source node to its downstream nodes in a super light path can be referred to be used. The recent advances in optical time division multiplexing (OTDM) shows the technique to be highly suited to the generation and transmission of high capacity data on a single optical carrier. This approach uses a single wavelength to carry capacities of at least 40 Gbps. Such systems are based on a clock frequency and tributary data rates which are easily accessible using electronic components. In this system or methodology the short optical pulses are used in a return-to-zero data transmission format with temporal interleaving to map a number of optical data channels into a single electronic clock cycle. It is an approach that can be used to achieve extremely high data-rate bit interleaved systems. This article summarizes the basic uses of optical time division multiplexing and outlines a possible methodology to evolve transport networks to encompass the potential that OTDM has to offer.