This MIB module manages the client side functionality of the Persistent Storage Device(PSD). This MIB instrumentation is for configuring data-store(PSD client) feature on GGSN and monitoring the state of the PSD server(up/down/full). The Cisco Persistent Storage Device(PSD) is an extension to existing storage on the Cisco Content Services Gateway(CSG). The GGSN currently allows sending of the CDRs to an active CG, while allowing up to two standby CG's to be configured. When all the configured CG's become unavailable, the CDRs get stored at the GGSN and start using up GGSN resources such as memory. As the amount of memory is limited on GGSN and failure of GGSN shall lead to losing these stored CDRs. Using PSD as temporary storage, shall avoid losses due to these problems. When all the configured CG's are unavailable, GGSN needs to backup the live closed CDR's to a PSD. When any of the CG's shall become available, GGSN shall retrieve the stored CDR's automatically from the PSD and forwards them to the active CG. PSD supports the charging protocol(GTP'), version 0 with a few private extensions, which is used to facilitate the required functionality via UDP. Acronyms and terms: CDR Call Detail Record CID Charging Identification CG Charging Gateway CGF Charging Gateway Functionality DS Data-Store ETSI European Telecommunications Standards Institute Ga Name of the interface between SGSN/GGSN and CG Gi Name of the interface between GGSN and PDN Gn Name of the interface between GGSN and SGSN G-CDR Gateway GPRS Support Node-Call Detail Record GGSN Gateway GPRS Support Node GPRS General Packet Radio Service GSM Global System for Mobile communication GTP GPRS Tunneling Protocol GTP' GTP enhanced for charging IE Information Element MS Mobile Station PDN Packet Data Network PDP Packet Data Protocol SGSN Serving GPRS support Node TOS Type of Service. PSD Persistence Storage Device.