Chapter 17. The Future of Telephony

We end this book with what we see as the future of telephony. This is a summary of what leading industry analysts think, with a bit of speculation from the authors just for kicks.

A Review of What We Have Now

At this point in the book, many of you have already installed a VoIP system in your home as either a complete replacement of your public switched telephone network (PSTN) phone or as a PSTN addon for free long-distance. Many of you also have a cell/mobile phone as well as a phone or private extension at work. That’s three and maybe even four different phones, on four different systems.

The good news is that despite the fact that all of these phones use different systems, all the systems can “talk” to each ...

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