On Sat, 4 Jul 2009, Werner Almesberger wrote:
> Timo Juhani Lindfors wrote: >>> My assumption is, that it takes far more than 2.5W, since the USB dongle >> >> How about measuring that? Just read the current_now file in /sys. > > Telephony can have very high current peaks, in the order of 2 A. > They are only short, i.e., the size of some transmit time slots, > so the average current is much lower, but if a design doesn't > adequately buffer those peaks, there will be problems. > > Problems should get worse in areas with poor or no reception. Yes, that makes absolutely sense. As soon as I started to transmit some more data than only a ping or nslookup, the connection was gone. Also, I _am_ in a region with poor reception, and I have only GPRS, no UMTS. So maybe Timo has better reception conditions or the better hardware around the Huawai chip. I have an UMTS dongle from FONIC which uses the O2 Network (whuaaa...). Alex. _______________________________________________ devel mailing list devel@lists.openmoko.org https://lists.openmoko.org/mailman/listinfo/devel
