Bps Send Mode - Oki OKIOFFICE44 Service Manual

300 bps Send Mode

Figure A2.1.4 shows the 300bps send protocol signal route
In G3 communication, this is the route of the procedural control signals (pre-message, post-message phases
etc.) at 300bps.
The protocol send data is read into DRAM in the sequence the contents of various data stored in the FLASH
memory area in advance under the control of CPU. The contents of the frame has been edited on the DRAM
by CPU and sent to MODEM via CPU. HDLC (high level data link control) frame of the data is structured by
the modem and converted to serial data in synchrony with the modem's DCLK (data clock). After modula-
tion, the protocol signal is output from "S" of the modem and sent to the telephone line L1 and L2 via the
transformer T1 of NCU.
Board Descriptions A - 14 OKIOFFICE 44 Serv. Man., P/N 59276801