This disclosure relates to systems and devices related to multiplexing optical data signals. A method may be disclosed for transporting optical data signals. The method may comprise transmitting, by a master terminal center (MTC) comprising a spine switch, the optical data signal to a coherent transport chassis. The method may comprise transmitting, by the coherent transport chassis, the optical data signal to a leaf switch of a secondary terminal center (STC). The method may comprise transmitting, by the leaf switch, the optical data signal to an optical communications module link extender (OCML) in the STC. The method may comprise transmitting, by the OCML, the optical data signal to a dense wave division multiplexer (DWDM).