Bps Receive Mode - Oki OKIOFFICE44 Service Manual

300 bps Receive Mode

Figure A2.1.5 shows 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 sent from pin R to
Pin RXA1 of the modem. After demodulation by the modem, the demodulated digital signals are sent to the
CPU via the data bus from the modem. The data is read and decoded by the CPU and written into the DRAM.
The written data is interpreted according to bit assignment of the binary procedural signals in the ITU recom-
mendations. The successive modes of communication (for example, line density, encoding scheme, etc.) are
determined.
Board Descriptions A - 16 OKIOFFICE 44 Serv. Man., P/N 59276801