On Mon, 17 May 2010, Khanh-Dang Nguyen Thu Lam wrote: > I now have a question about these two lines in /proc/bus/usb/devices: > # > I:* If#= 2 Alt= 1 #EPs= 1 Cls=0a(data ) Sub=00 Prot=00 Driver=ueagle-atm > E: Ad=88(I) Atr=01(Isoc) MxPS= 159 Ivl=1ms > # > Does it mean that ueagle-atm has allocated a bandwidth of 159B / 1ms > (i.e. 159kBi/s) for incoming data? Yes. > If so, what happens if the modem > receives more than 159kBi/s? This depends on how the modem was designed. It may buffer the excess data and send it as time permits, or it may drop the excess data. > Does the USB specs allow the modem to use > more USB bandwidth than allocated (when in isochronous mode)? No. Alan Stern -- 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
