> 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/system-information-messages/system-information-13-si13.md).

# System information-13 (SI13)

Carry GPRS related information needed for PS call.

![](https://1516040574-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fg081KOVSE5kjkOj8LvCP%2Fuploads%2FSjmwb8w1qwW4xKvdRQmD%2Fimage.png?alt=media\&token=024303ee-5a24-463b-8d87-3a85a0b8e889)