  Two important classes of quantum channels, namly the Werner-Holevo and the
Landau-Streater channels are known to be related only in three dimensions, i.e.
when acting on qutrits. In this work, definition of the Landau-Streater channel
is extended in such a way which retains its equivalence to the Werner-Holevo
channel in all dimensions. This channel is then modified to be representable as
a model of noise acting on qudits. We then investigate propeties of the
resulting noisy channel and determine the conditions under which it cannot be
the result of a Markovian evolution. Furthermore, we investigate its different
capacities for transmitting classical and quantum information with or without
entanglement. In particular, while the pure (or high noise) Landau-Streater or
the Werner-Holevo channel is entanglement breaking and hence has zero capacity,
by finding a lower bound for the quantum capacity, we show that when the level
of noise is lower than a critical value the quantum capacity will be non-zero.
Surprizingly this value turns out to be approximately equal to $0.4$ in all
dimensions. Finally we show that, in even dimension, this channel has a
decomposition in terms of unitary operations. This is in contrast with the
three dimensional case where it has been proved that such a decomposition is
impossible, even in terms of other quantum maps.
