Description: The MIB Module for managing the General Packet Radio Service(GPRS) iSGSN protocol on Servicing GPRS Support Node (SGSN). In the Alcatel/Cisco SGSN architecture, a Telecom part (T-unit) and Datacom part (D-unit) have been defined. The Datacom part is in charge of managing the Gn interface with the GPRS backbone. The Telecom part is in charge of managing the Gb interface with the BSS. The iSGSN protocol is the high layer protocol of the interface between the Datacom part and Telecom part. It supports the relay function between the Gb and Gn protocol stacks, and intra SGSN nodes management.