> For the complete documentation index, see [llms.txt](https://ss7.learn-telecom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ss7.learn-telecom.com/devices.md).

# Devices

- [Cards](https://ss7.learn-telecom.com/devices/cards.md)
- [SSP - Service Switching Point](https://ss7.learn-telecom.com/devices/ssp-service-switching-point.md)
- [STP - Signaling Transfer Point](https://ss7.learn-telecom.com/devices/stp-signaling-transfer-point.md)
- [SCP - Service Control Point](https://ss7.learn-telecom.com/devices/scp-service-control-point.md)