Telegrams are not completely tapped out
geek stuff

Key to a sustainable telecoms platform.
The telegram, the original electronic messaging medium, is 175 years old and still carrying traffic, at least in some parts of the world. But the end might finally be in sight. India’s state owned telecoms company, BSNL, is shutting down telegram service next month, citing smartphones and text messaging as the cause.
The one thing that telegrams do as a matter of course, and competing media do not, is provide third-party authentication of an electronic message.… More