Telco has so, so, so, so many obscure and complicated technical specifications. They love their acronyms... https://www.openmobilealliance.org/specifications/

Telco has so, so, so, so many obscure and complicated technical specifications. They love their acronyms... https://www.openmobilealliance.org/specifications/ https://www.openmobilealliance.org/specifications/ Is probably a decent place to start