# System daemons

- [General overview](/start/kde-developer-platform/readme/packaging/plasma-mobile/telephony/system-daemon-userland-dbus-ipc-level/_index.md): Userland D-Bus IPC, KDE Telephony stack
- [Developing Telephony functionality](/start/kde-developer-platform/readme/packaging/plasma-mobile/telephony/system-daemon-userland-dbus-ipc-level/ofono.md)
- [ModemManager Telephony functions](/start/kde-developer-platform/readme/packaging/plasma-mobile/telephony/system-daemon-userland-dbus-ipc-level/modem-manager.md)