Youngster - some of remember using 300 baud acoustic couplers and getting excited when 1200 baud was introduced...
It's generally for devices such as modems where the data rate to the modem was typically 115200, but the data rate over the phone line was 56000 or lower. The modem had to be able to tell the computer to stop sending data before the buffers in the modem overflowed.
https://en.wikipedia.org/wiki/Acoustic_coupler (US bias - U.K. had licence terms from the GPO for device connection that did not impact acoustic connections).
Statistics: Posted by MiscBits — Mon Jul 15, 2024 12:08 pm