GSUP (Generic Subscriber Update Protocol)

GSUP is an Osmocom-specific protocol used between OsmoMSC and OsmoSGSN on the one hand side, and OsmoHLR on the other side. It is a light-weight alternative to the complex SS7/TCAP/MAP protocol traditionally used in 3GPP networks.

For more information, please see the chapter "Generic Subscriber Update Protocol" in the OsmoHLR user manual found at