1861: Simple Network Paging Protocol - Version 3 -Two-Way Enhanced.

This RFC suggests a simple way for delivering wireless messages, both one and two-way, to appropriate receiving devices. In its simplest form, SNPP provides a simple way to implement a "shim" between the Internet and a TAP/IXO paging terminal. In its level 3 form, it provides an easy-to-use (and build) method for communicating and receiving end-to-end acknowledgments and replies from two-way messaging devices (such as ReFLEX units).