G cluster_hlr OsmoHLR GSUP GSUP server DB SQLite DB GSUP->DB CTRL CTRL DB->CTRL VTY VTY DB->VTY SW 3rd party software integration CTRL->SW Admin Admin and Maintenance VTY->Admin MSC MSC/VLR MSC->GSUP GSUP SGSN SGSN SGSN->GSUP GSUP BSC BSC BSC->MSC HNBGW HNBGW HNBGW->MSC HNBGW->SGSN PCU PCU PCU->SGSN