Re: interface for modems with out of band signalling

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Oliver Neukum wrote:
Hi,

I have got a question about modems which use the AT command set, but
don't use in band signalling like true rs232 modems. Would two device nodes
per communication channel be a good interface?
Huh? What do you mean "don't use in band signaling"? If you are asking
how you issue AT commands to the modem while connected, you have to
break to command mode. IIRC, this involves sending a special break
character or two with the correct delay between them, or flipping one of
the RS232 handshake lines.

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