  We consider a pair of coupled queues driven by independent
spectrally-positive Levy processes. With respect to the bi-variate workload
process this framework includes both the coupled processor model and the
two-server fluid network with independent Levy inputs. We identify the joint
transform of the stationary workload distribution in terms of Wiener-Hopf
factors corresponding to two auxiliary Levy processes with explicit Laplace
exponents. We reinterpret and extend the ideas of Cohen and Boxma (1983) to
provide a general and uniform result with a neat transform expression.
