A system arrangement for use in an automobile for low latency and fail-safe command propagation allowing a targeted actuation of each of a plurality of client devices (CD) in real-time, comprising: - an initiator device (I) arranged to generate and initiate commands; - a series of branch devices (BD) communicatively coupled to the initiator device (I) via an Initiator Side Port (ISP), the series of branch devices (BD) being communicatively connected using a transmission medium; - the plurality of client devices (CD) being segmented into a plurality of serial branches each of at least two client devices (CD) along a branch type data line each branch being connected to respectively one branch device (BD), wherein each branch device (BD) directly provides commands generated and initiated by the initiator device (I) to respectively a first client device (CD) using a Client Side Port (CSP) of respectively one branch being connected with the branch device (BD) according to a configured mode (M0, M1, M2, ... , M6), wherein the command is further propagated to the at least one further client device (CD) via the Client Side Port (CSP) of the respective branch device (BD), the mode being configured as a function of the generated command and by a number of received link attention events, wherein the decoded Frame Synchronization event is defined as Link attention and once a Frame Sync is received the number of received link attention events is incremented, wherein upon reception of such an expiry criteria the mode is switched back to a previous mode, wherein the branch device receives a command which provides information to switch to a certain mode and the mode is maintained for a certain number of events and each command holds a sync frame, wherein once the specified number of commands, and therefore sync frames, is received the branch mode switches back to the previous mode. - an initiator device (I) arranged to generate and initiate commands; - a series of branch devices (BD) communicatively coupled to the initiator device (I) via an Initiator Side Port (ISP), the series of branch devices (BD) being communicatively connected using a transmission medium; - the plurality of client devices (CD) being segmented into a plurality of serial branches each of at least two client devices (CD) along a branch type data line each branch being connected to respectively one branch device (BD), wherein each branch device (BD) directly provides commands generated and initiated by the initiator device (I) to respectively a first client device (CD) using a Client Side Port (CSP) of respectively one branch being connected with the branch device (BD) according to a configured mode (M0, M1, M2, ... , M6), wherein the command is further propagated to the at least one further client device (CD) via the Client Side Port (CSP) of the respective branch device (BD), the mode being configured as a function of the generated command and by a number of received link attention events, wherein the decoded Frame Synchronization event is defined as Link attention and once a Frame Sync is received the number of received link attention events is incremented, wherein upon reception of such an expiry criteria the mode is switched back to a previous mode, wherein the branch device receives a command which provides information to switch to a certain mode and the mode is maintained for a certain number of events and each command holds a sync frame, wherein once the specified number of commands, and therefore sync frames, is received the branch mode switches back to the previous mode. <EOS>