 14.4 kbit/s modems were standard for a number of years while various companies attempted to introduce non-standard systems with higher performance, normally about 19.2 kbit/s.
<fluency>  14.4 kbit/s modems were standard for a number of years while various companies attempted to introduce non-standard systems with higher performance, normally about 19.2 kbit/s.
 14.4 kbit/s modems were standard for a number of years while various companies attempted to introduce non-standard systems with higher performancenormally about 19.2 kbit/s.