OPS DIS SSS MOST
On vehicle models from the E*5 on, BMW is for the first time using fibre-optic cables as standard for communication between control units.The optical buses are notable for their high data transmission rate and they are not susceptible to electromagnetic interference. The optical buses in question are the MOST bus, primarily used for in-car entertainment electronics, and the byteflight  bus, which  serves  predominantly safety-critical functions.

OPPS has been designed for encoding, individualising and programming (CIP) via the Software Service Station (SSS) and envisaged for use as part of the BMW diagnostic system (DIS)  from DISPlus and Group Tester One (GT1). It is intended for testing and programming tasks from the E*5 series, taking the place of the diagnostic head. 
                                    
OPS is intended for rapid programming of control units.When operated at the SSS, no diagnostic or technical measuring pro-cedures are possible, as no measuring technology is incorporated; in this  instance, OPPS  / OPS  is  used  predominantly  for  programming control units (flashing). Communication with the vehicle can be performed both via the MOST and via the OBD interface. The OBD interface is required for the power supply to the OPPS / OPS and has communication properties via which the vehicle can be identified and the data to be programmed can be determined.