2009/8/19 Guenter <lists_at_gknw.net>:
> Hi Georg,
> Georg Lippitsch schrieb:
>>> 1) 2mbit umts connection (HUAWEI E270 modem)
>
>>> CURL_MAX_WRITE_SIZE 4096 -> 90k
>>
>> No, default CURL_MAX_WRITE is 16384.
>>
>>> CURL_MAX_WRITE_SIZE 40960 -> 200k
>
> I did google a bit, and the issue might perhaps be releated to the E270
> itself; I have found this sentence on their website:
> "the world's first High-Speed Uplink Packet Access (HSUPA) USB Modem,
> E270" ...
> http://www.huawei.com/mobileweb/en/news/view.do?id=400&cid=61&type=0
>
> probably the device does some packet compression, whatever, and with
> smaler upload chunks the overhead is bigger? Perhaps the modem has an
> upload transfer buffer of 65535, and that's the optimum for this device?
> Perhaps its worth to dig a bit into this direction, look if you can find
> find out further details about the 'Uplink Packet Access', and can find
> a technical description of the device ...

Maybe the problem is caused by a packets per second limitation of the
hardware rather than a bits per second limitation?

-- 
Michael Wood <esiotrot_at_gmail.com>