02-03-2018, 09:19 AM
From my understanding of the specification, DTR is set low when the computer is ready and DSR is set low when the modem is ready. These were never intended to act as modem hang up requests or status. DCD is used for modem's online state. DSR is to let the computer know the modem is ready to use. Some printers (and the Apple IIc) use DTR/DSR in place of RTS/CTS. in fact, you can just connect DTR/DSR to RTS/CTS at the DB25 connector in the cable instead of cutting traces and bridging connections on the WiModem232. Most all systems have DTR connected to DSR, so when the computer says it's ready, the modem is also said to be ready.
What are you using that actually wants the DTR/DSR working as you describe?
What are you using that actually wants the DTR/DSR working as you describe?