Next make the opposite port active for transmit. Type characters in B&B 3PCIOSD1B window for the transmitting port, observe them in the lower window of the receiving port. If each port can transmit from one to the other and receive from the other, the converter is most likely working fine. Any other problem may be B&B 3PCIOSD1B related. RTS control timing can be critical for half duplex RS control, and can be erratic under windows. B&B 3PCIOSD1B SD Control units[…]
