A method of transporting traffic on an optical ring includes, at one or
more nodes coupled to the optical ring, splitting an incoming signal
(including traffic in a plurality of sub-bands) into a first signal and a
second signal. The first signal includes the traffic in a first sub-band
of traffic channels and the second signal includes the traffic in the
remaining sub-bands of traffic channels of the incoming signal. The
method also includes receiving the traffic in the first sub-band at a
bypass element, rejecting the traffic in a first portion of the first
sub-band at the bypass element, and forwarding the traffic in a second
portion of the first sub-band at the bypass element. In addition the
method includes, combining the traffic in the second signal with the
traffic in the second portion of the first sub-band for transport on the
network.