Introduction

The CEBus-EIB Router Medium Access Control (MAC) Sublayer is almost identical to the CEBus or EIB Node MAC Sublayer corresponding to the "CEBus side" or the "EIB side" of the Router. The differences are in the way the Router does address matching on a received packet and on the information exchanged in some of the service primitives. Rather than copy the Node MAC specification here and make minor changes, the Router MAC is specified by exception to the Node MAC for both the CEBus and EIB specifications. The reader should have a clear understanding of the Node MAC and Logical Link Control (LLC) Sublayers before reading this specification. A prose description of the CEBus Node MAC and LLC is contained in EIA-600.41 Description of the Data Link Layer. The CEBus MAC technical specification is contained in EIA-600.42 Node Medium Access Control Sublayer.