A
Hi there.
I'm working in traffic telematics, and use a roadside equipment to measure traffic that is called a "Golden River Marksman 660". The manufacturer states that "it doesn't actually support hardware handshaking" and "expects the CTS signal to be held high by the modem.
I have been trying to make a telemetry system in order to connect to a remote site via a GSM modem (in this case Ericsson GM25 modules). The thing is, although I don't have any problems talking to the machine via RS-232 directly from a PC with 9600-8-N-off, and hyperterminal, when I use a modem in between I get no answer, even if I program "full transparency" on the modem (via AT commandS), that is:
-no flow control
-ignore DTR line
-no carrier detect
-no echo (ATE0Q1)
-CTS always on
-DSR always on
-comms between modem/monitor at 9600
-auto-answer, of course.
Can anybody give me a hint?
I'm working in traffic telematics, and use a roadside equipment to measure traffic that is called a "Golden River Marksman 660". The manufacturer states that "it doesn't actually support hardware handshaking" and "expects the CTS signal to be held high by the modem.
I have been trying to make a telemetry system in order to connect to a remote site via a GSM modem (in this case Ericsson GM25 modules). The thing is, although I don't have any problems talking to the machine via RS-232 directly from a PC with 9600-8-N-off, and hyperterminal, when I use a modem in between I get no answer, even if I program "full transparency" on the modem (via AT commandS), that is:
-no flow control
-ignore DTR line
-no carrier detect
-no echo (ATE0Q1)
-CTS always on
-DSR always on
-comms between modem/monitor at 9600
-auto-answer, of course.
Can anybody give me a hint?