README.md

call-control-mncc-sap

Call control services (MS side) in Layer3 (CM) partial protocol stack implementation for MNCC-SAP access points MNCC stands for Mobile Network Call Control The repository contains an implementation of elementary procedures for Circuit Switched (CS) Call Control (CC) in 3GPP.

Inspiration

This repository has been inspired by Harald Welte et al. and osmocom projects.
It is a reverse engineering project by:

• 3GPP specification of MNCC-SAP
• Call Conrol in Python for OpenNITB MNCC Interface (not OsmocomBB ~ although interface more or less is the same)
• Linux Call Router has an implementation for bridging calls (MNCC socket interface)

Description:

The project has been tested with OsmcomBB MNCC socket interface (/tmp/ms_mncc_). This external socket allows you to build L3 Messages that acts as an external call control application and send it to the OsmocomBB compatible phone.
It has two implementation, one is C and the other in Python.