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Congratulations Mike Lewis on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
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modem connects as a caller but not as a callee
I have 2 landlines and a separate modem connected to each of them monitoring their actions by 2 instances of Hyperterminal. If I dial modem B from modem A and respond to “RING” by ATA, the modems connect after 30 secs or so. In the other direction (dialing A from B) “RING” appears, ATA is... -
Modem refuses to dial for a micro controller
Ok, I can now answer my own question. My problem was: I naivly assumed that Tx,Rx and ground is sufficient. It is not, the Modem wants to see "Data Terminal ready" and "request to send" on. The confusing thing was the strange behaviour of my particular modem: doing everything without these... -
Modem refuses to dial for a micro controller
I want a micro controller to communicate via a ds276 chip with a Trust MD1200 modem. This works fine (e.g. with ATI.. and ATE.. commands) but the moment it encounters a dial command within a command string it returns “error”. However, if I talk to it via hyperterminal it dials ok. I have tried...
