Hello everyone, thanks for the ideas you gave me about how i can learn more about the communication between BSC and MSC in my sysmoBTS. Since last week i've been looking at the source codes and it's still difficult for me to follow the exchanged messages betwenn BSC and MSC. I don't have high programming skills. Instead of using sysmoBTS as an autonomous self-contained GSM network (NITB mode), i'd like to configure it in the BSC-only mode running the osmo-bts and osmo-bsc. I read that i will need a MSC that can provide an A-over-IP interface using SCCP-lite. I saw that the "on-waves/bsc-master" branch is implementing such a SCCP and works have been done to create a GSM0808 like API and move the MSC code inside OpenBSC over to use this API. So i was wondering how far this project has been developed yet. Do you already have any interesting results that can help me? If not, it can be also interesting for me to know how you did your tests by implementing the bsc-only mode (osmo-bsc)? Did you connect it to a real MSC or did you have anything else emulating the MSC/HLR/VLR/EIR functions? Best regards Yann