> For the complete documentation index, see [llms.txt](https://docs.redlabs.cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.redlabs.cloud/2g-gsm.md).

# 2G GSM

- [2G In a B0x](https://docs.redlabs.cloud/2g-gsm/2g-in-a-b0x.md)
- [SIM Cards](https://docs.redlabs.cloud/2g-gsm/sim-cards.md)
- [BTS](https://docs.redlabs.cloud/2g-gsm/bts.md)
- [BSC - Base Station Controller](https://docs.redlabs.cloud/2g-gsm/bsc-base-station-controller.md)
- [MSC - Mobile Switching Center](https://docs.redlabs.cloud/2g-gsm/msc-mobile-switching-center.md)
- [STP - Signal Transfer Point](https://docs.redlabs.cloud/2g-gsm/stp-signal-transfer-point.md)
- [MGW - Media Gateway](https://docs.redlabs.cloud/2g-gsm/mgw-media-gateway.md)
- [SGSN - Serving GPRS Support Node](https://docs.redlabs.cloud/2g-gsm/sgsn-serving-gprs-support-node.md)