Telephony’s basic premise (one on one instant communication) hasn’t changed in the last 150 years. In the era of internet based broadcast mediums like twitter and facebook, it’s easy to slot the humble telephone into the dinosaur category.
Thanks to the mobile explosion though, 85% the world now has a telephony connection of some sort, making it the largest social network.
The first modern revolution in telephony was messaging. It removed the historical limitation of voice in telephony and allowed subscribers to communicate in a richer, time-shifted & less intrusive manner.