For setting up a 2G network with data network support, this package is needed

The SGSN implements - the Gb interface to the BSS's (like the OsmoPCU or an ip.access nanoBTS) - the Gp interface with its GTP protocol to one or more Gateway GPRS Support Node (GGSN) like OsmoGGSN. - the IuPS interface with its RANAP protocol to onre or more RNCs or HNB-GWs like OsmoHNBGW - the GSUP Interface/Protocol towards OsmoHLR