> For the complete documentation index, see [llms.txt](https://gsm.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://gsm.learn-telecom.com/architecture/oss-operation-support-subsystem.md).

# OSS - Operation Support Subsystem

- [OMC - Operation and Maintence Center](https://gsm.learn-telecom.com/architecture/oss-operation-support-subsystem/omc-operation-and-maintence-center.md)
- [NMC - Network Managment Center](https://gsm.learn-telecom.com/architecture/oss-operation-support-subsystem/nmc-network-managment-center.md)