The collapse fixed line voice, both analog and digital is obvious. People are turning away from phone calls because of the time wasted and workflow disruption. I’ve talked about this on the Packet Pushers Podcast many times because its obvious yet I still get email telling me that their VoIP business has never been better.
Here are some numbers showing the dramatic reductions in fixed line call voice volumes from 2008 -2013.
Source: @BenedictEvans https://twitter.com/BenedictEvans/status/543163451078496256
Now is you are based in the USA there is a market distortion because the cost of mobile phone calls / plans are the most expensive in the world. Many people still use land lines, probably in the corporate office, to reduce their mobile phone costs.
Source: @BenedictEvans https://twitter.com/BenedictEvans/status/543164668961771522
The EtherealMind View
Fixed line voice is a dying market (including VoIP). It will take a couple of decades to shrink but these numbers show a shrinking market.
There is limited motivation in investing in voice technologies with your time or career planning/learning.
Call centre business functions will be increasingly be replaced by software, Internet and mobile apps (and are really miserable places to work).
TL:DR – IP Telephony is a dying business because mobile phones.