POCSAG Paging protocol
With this radio protocol you can send messages to POCSAG-enabled pagers.
Software
UniPager
– Universal POCSAG transmitter controller written in Rust, used for Hampager.de / DAPNET
gr-mixalot
– a set of GNU Radio blocks/utilities to encode pager messages. It supports the POCSAG, FLEX, and Golay/GSC protocols.