http://www.rfc-editor.org/rfc/rfc1861.txt
RFC 1861: Simple Network Paging Protocol - Version 3 -Two-Way Enhanced, A. Gwinn1995-10-01T23:00:00-00:00This RFC suggests a simple way for delivering wireless messages, both one and two-way, to appropriate receiving devices. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.