Board Descriptions A - 16 OF 5300/5600 Serv Man, P/N 59278301(5) 300 bps Receive ModeFigure A2.2.5 shows the 300bps receive protocol signal route.In G3 communication, this is the route of the procedural control signals (pre-message, post-message phases etc.) at 300bps.The 300bps modulated signals received via the telephone line L1 and L2 of the NCU are sentfrom pin R to Pin RXA1 of the modem. After demodulation by the modem, the demodulateddigital signals are sent to the CPU via the data bus from the modem. The data is read anddecoded by the CPU and written into the DRAM. The written data is interpreted according to bitassigment of the binary procedural signals in the ITU recommendations. The successive modesof communication (for example, line density,encoding scheme, etc.) are determind.
