Samsung DX-408 Installation Manual page 51

MMC 804
In order to program the DX408i system by PC it is necessary to set the Service Type of the SIO
port as PCMMC using system programming (MMC 804).
Parameters related to PCMMC and remote programming are also set in system programming
(MMC 804).
The pin connections from SIO port to PC/modem are as follows.
PCMMC
SIO port
9PIN
RXD(2) ---------------------------------------
TXD(3) ---------------------------------------
GND(5) ---------------------------------------
Remote Programming
SIO port
9PIN
RXD(2) ---------------------------------------
TXD(3) ---------------------------------------
GND(5) ---------------------------------------
DTR(4) ---------------------------------------
PC
25PIN 9PIN
TXD(3) TXD(3)
RXD(2) RXD(2)
GND(7) GND(5)
MODEM
25PIN
TXD(3)
RXD(2)
GND(7)
DTR(20)
3-7