2G/3G PS Core Network Interfaces (GPRS/UMTS)
Hello.. You can find the full course through the following link, https://mpc-courses.teachable.com/p/l... or you can visit https://MobilePacketCore.com Gb is the interface between the BSC and the SGSN. Iu PS is the interface between the RNC and the SGSN. Gn/Gp is the interface between the SGSN and the GGSN. Gr is the interface between the SGSN and the HLR. Gi is the interface between the GGSN and the PDN.
