Pins is as follows:
3 - Transmit
4 - clear to send
5 - ground
PABX -> PC
3 - 2
4 - 6 (True Handshake)
5 - 5
PABX configuration:
Activate port as SMDR port.
Program code 804:
Change to SMDR port (default it is set to PCMMC).
Mode 725:
Switch on what you need (incoming, outgoing, account, ...).
Please contact your SAMSUNG technician for more detail.
Under investigation!