This repository contains a C-language implementation of a GSM Home Location Register (HLR). It is part of the Osmocom Open Source Mobile Communications project.
Warning: While the HLR logical functionality is implemented, OsmoHLR does not use the ETSI/3GPP TCAP/MAP protocol stack. Instead, a much simpler custom protocol (GSUP) is used. This means, OsmoHLR is of no use outside the context of an Osmocom core network. You can use it with OsmoMSC, OsmoSGSN etc. - but not directly with third party components.
The official homepage of the project is https://osmocom.org/projects/osmo-hlr/wiki.
You can clone from the official osmo-hlr.git repository using
git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-hlr
There is a web interface at https://gitea.osmocom.org/cellular-infrastructure/osmo-hlr
User Manuals and VTY reference manuals are [optionally] built in PDF form as part of the build process.
Pre-rendered PDF versions of the current master can be found at
We welcome any osmo-hlr related discussions in the Cellular Network Infrastructure -> 2G/3G Core Network section of the osmocom discourse (web based Forum).
Discussions related to osmo-hlr are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.
Please observe the Osmocom Mailing List Rules when posting.
We use the issue tracker of the osmo-hlr project on osmocom.org for tracking the state of bug reports and feature requests. Feel free to submit any issues you may find, or help us out by resolving existing issues.
Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards
We use a Gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details
The current patch queue for osmo-hlr can be seen at https://gerrit.osmocom.org/#/q/project:osmo-hlr+status:open