Sg3 Board - Ricoh D129 Service Manual

Boards

5.2.2 SG3 BOARD

The SG3 board allows up to three simultaneous communications when used in combination with
the FCU and optional G3 boards. The NCU is on the same board as the common SG-3 board.
This makes the total board structure smaller. But, the specifications of the SG3 board do not
change.
NCCP (New Communication Control Processor)

Controls the SG3 board.

CPU (RU30)

DPRAM (Dual Port RAM): Handshaking with the FCU is done through this block.

DMA controller

JBIG

DSP V34 modem (RL5T892): Includes the DTMF Receiver function

DCR for MH, MR, MMR, and JBIG compression and decompression
D629 178 SM