Methodology for Broadband Token Passing Bus Interoperability Testing

摘要

A method for testing broadband token passing bus interoperability is described. The method was tested in a controlled laboratory environment at the National Bureau of Standards with four modem manufacturers' and three headend remodulator manufacturers' equipment. The tested equipment implemented specific token passing bus options found in commercially available products. The methodology specifies seven environmental and electrical parameters; for the first set of tests, nominal parameter settings were selected. The methodology uses specific test frames developed for their unique bit patterns. These frames were transmitted, received, and counted to exercise the broadband modems and headend remodulators. The methodology organizes the frame transmissions into five test definitions. Each test definition is repeated for each headend remodulator.