A Comparison of PSTN and IP Traffic From 1997 to 2015. Slides start on page #4.
[slideshare id=8515037&doc=acomparisonofpstnandiptrafficfrom1997to2015-110705135902-phpapp02&type=d]
A Comparison of PSTN and IP Traffic From 1997 to 2015
- By: Dr. Shawn DuBravac
- Blog, nature of technology, trends
Related
The following was published in January 2008: Throughout the history
Here’s the article. All are sound except #9.