bcohen5055 parent
I may be wrong but aren't we going backwards here...
data over voice=dialup right? 56kb/s ideal? Still possibly useful but this just reminds me of the wep browser days on my old nokia
56kbps over landlines. That works because the landline network, when it is trunked, is compressed into 56kbps or 64kbps channels using methods the 56kbps modems were explicitly designed to take maximal advantage of.
Over a cell phone connection you will get much less. GSM data modems gets to bypass the voice codec, and are still limited to 9600 bps. An acoustic modem over a GSM connection will get less than that, if it will connect at all: A full data rate GSM code is compressing the audio down to about 12.2kbps using codecs geared towards reproducing voice as well as possible, which is going to be brutal to a regular modem and far more wasteful than GSM data.