bag@tech.perpk.nt.com (Bill Gutknecht) (06/21/91)
I have this AGILE protocol converter on one of my printers. It accepts data from an IBM mainframe. The AGILE has an auxiliary input port on it. By connecting an Apollo, I have a fancy, automatic A/B switch ... ie. both computers are allowed to use the printer, but only one at a time. If the IBM is currently printing and the Apollo tries to send data, some of that data is buffered and then the CTS (Clear to Transmit) line goes LOW. Well, the Apollo keeps on sending ... even with cts_enabled (see tctl) The AGILE acts as a DCE and since the Apollo is a DTE, I should be able to use a 'straight' cable between the both of them. Just for grins, I connected a RS232 protocol analyzer to the Apollo and set it up to slowly toggle the CTS line over and over as the Apollo sent data. Much to my surprise, the Apollo sent data when the CTS line was LOW (which the protocol analyzer calls off) and did not send when the CTS line was HI (which the protocol analyzer calls on) Any ideas? Perhaps I've got the wrong idea on how this is all supposed to work. I'd use XON/XOFF, but I can't figure a way to get the AGILE to work that way. Thanks loads ... Bill Gutknecht bag@perpk.nt.com Systems Administrator (919) 481 - 8603 DMS10 Development Northern Telecom Inc "When I die, I will go before Crom and he will Morrisville, NC ask me the Riddle of Steel ... "