A method includes transmitting, at a first wavelength, a first
configuration message on the PON including a first transmitter interface
number and transmitting, at a second wavelength, a second configuration
message on the PON including a second transmitter interface number. The
method further includes receiving a configuration response message from a
first set of ONUs that comprises the first transmitter interface number
and from a second set of ONUs that comprises the second transmitter
interface, associating the first set of ONUs with the first wavelength
and the second set of ONUs with the second wavelength, and transmitting
downstream traffic destined for any ONU in the first set of ONUs at the
first wavelength and transmitting downstream traffic for any ONU in the
second set of ONUs at the second wavelength.