An optical line terminal, OLT, comprising: a first tunable transmitter array comprising a first tunable transmitter and a second tunable transmitter; a cyclic array waveguide grating, AWG, wavelength router coupled to the first tunable transmitter array; and a plurality of multiple channel receivers, coupled to the cyclic AWG wavelength router; wherein each of the plurality of multiple channel receivers comprise a plurality of channel receivers that are each configured to receive an upstream encoded wavelength; wherein the number of channel receivers within each of the plurality of multiple channel receivers is the same as a maximum number of transmitted upstream wavelengths; wherein the cyclic AWG wavelength router comprises a plurality of input ports and a plurality of output ports, wherein the cyclic AWG wavelength router is configured to: receive a first optical signal emitted from a first tunable transmitter via a first input port of the plurality of input ports; receive a second optical signal emitted from a second tunable transmitter via the first input port of the plurality of input ports; and route the first optical signal and the second optical signal to the output ports dependent on one or more wavelengths used to encode the first optical signal and the second optical signal, and wherein the output ports are coupled to a plurality of optical distribution networks, ODNs. a first tunable transmitter array comprising a first tunable transmitter and a second tunable transmitter; a cyclic array waveguide grating, AWG, wavelength router coupled to the first tunable transmitter array; and a plurality of multiple channel receivers, coupled to the cyclic AWG wavelength router; wherein each of the plurality of multiple channel receivers comprise a plurality of channel receivers that are each configured to receive an upstream encoded wavelength; wherein the number of channel receivers within each of the plurality of multiple channel receivers is the same as a maximum number of transmitted upstream wavelengths; wherein the cyclic AWG wavelength router comprises a plurality of input ports and a plurality of output ports, wherein the cyclic AWG wavelength router is configured to: receive a first optical signal emitted from a first tunable transmitter via a first input port of the plurality of input ports; receive a second optical signal emitted from a second tunable transmitter via the first input port of the plurality of input ports; and route the first optical signal and the second optical signal to the output ports dependent on one or more wavelengths used to encode the first optical signal and the second optical signal, and receive a first optical signal emitted from a first tunable transmitter via a first input port of the plurality of input ports; receive a second optical signal emitted from a second tunable transmitter via the first input port of the plurality of input ports; and route the first optical signal and the second optical signal to the output ports dependent on one or more wavelengths used to encode the first optical signal and the second optical signal, and wherein the output ports are coupled to a plurality of optical distribution networks, ODNs.