The key to this beautifully distributed control structure is the Digital Switching Network (DSN). The DSN replaces not only the conventional switching network and its centralised control, but also the intercommunication buses that are required for the centralised processor to communicate and control each of the individual micro control processors.
For the AXE10 passionate amongst us, this can be summed up as; "The DSN replaces not only the Group Switch and its centralised control, but also the Regional Processor (RP) buses that are required for the CP to communicate and control with each of the individual RP`s".
Due to the age of this switch it is now classed as a legacy node. The particular node that my project developed will be used as a screen and repair node to verify any repairs or modifications to Customer boards are complete before they are returned to the Customer.