http://www.rfc-editor.org/rfc/rfc1568.txt
RFC 1568: Simple Network Paging Protocol - Version 1(b), A. Gwinn1994-01-01T23:00:00-00:00This RFC suggests a simple way for delivering both alphanumeric and numeric pages (one-way) to radio paging terminals. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.