Bus monitor circuit for switching system

Abstract From the Canadian patent

In a switching system, a data bus which interconnects circuit modules, a switching network module and a control module for transporting packets between the interconnected modules. A bus interface (16) is connected to the data bus (13) for receiving a copy of every packet on the data bus. An error detector (18) determines whether the received packet contains an error, and produces an error detect signal and an error check result if the received packet is determined as having an error. In response to the error detect signal, the received packet the error check result and, time-of-day data are stored into a register (19) and transferred to one of the storage locations of a memory (20) to keep …