> 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/nss-network-switching-subsystem/vms-voice-mail-subsystem.md).

# VMS - Voice Mail Subsystem