At system initialization, the number of devices (analog interface, digital interface, voice, facsimile, etc.) on each board and the number of SCbus time slots required to service these devices are identified. Only one device can transmit to an SCbus time slot at a time. To assure this, the transmit channel of each device is assigned to a specific and unique SCbus time slot at system initialization. These transmit assignments cannot be changed by the application.
Assume that after system initiation, the SCbus time slots are assigned to the transmit channel of each device as shown in Figure 1. As this figure shows, the following transmit channel assignments were made.
These transmit channel assignments cannot be changed by the application.
Each device transmits on their assigned SCbus time slots and listens to other devices via a Switch Handler that manages all communications across the SCbus.
Figure 1. System Initialization SCbus Time Slot Assignments
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