On Wed, 2009-03-11 at 12:15 +0100, Matthias Urlichs wrote: > Hi, > > oliver@xxxxxxxxxx: > > > Ideally we'd use a single port and multiplex the required > > channels > > > across it, but we live in a non-ideal world with > > far-from-ideal device > > > firmware. > > > [ Why are all your emails breaking up the indentation? > Too-narrow terminal window? ] > > > Why do you want to > > multiplex? > > > Because some devices export more capabilities in multiplex mode > (working flow control, more than one auxiliary command port). > > Unfortunately, many others don't support multiplexing at all, are buggy > (esp. WRT flow control), don't support channel attribute discovery, > are incapable of being switched out of multiplex mode without power > cycling, and/or don't supply documentation for their particular > implementation of the supposedly-standardized multiplex mode without > signing a too-restrictive NDA. How does the GSM multiplexing capability show up? Do you just have to know which device+firmware combinations support it, or can it be probed somehow? Dan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
