This European Telecommunication Standard (ETS) defines the physical convergence procedure at 139@ 264 Mbit/s for use in the context of a subnetwork of a Metropolitan Area Network (MAN). Additional slot mappings for use in transit networks and use of methods defined in this standard for other purposes are outside the scope of this ETS. Conformance to this ETS is not defined outside the scope of an European MAN@ Methods of testing will be the subject of separate arrangements.