This MIB module extends the CISCO-GGSN-MIB.

This MIB module manages the Gateway GPRS Support
Node (GGSN) devices.

A GGSN device provides interworking with external
packet-data network of a particular GPRS service
provider. It provides a combination of IP routing
and GPRS specific functionality to support mobile
users.
A PDP context on the GGSN device contains the mobile users
session information, during an active session. This
information is used by the device to control the session. 
An active PDP context is created when a mobile station's
service request is authenticated and served by the GGSN device.

Acronyms and terms:
APN       Access Point Name
CDR       Call Detail Record
COA       Change of Authorization
CSG2      Content Services Gateway (2nd Generation)
DT        Direct Tunnel
DFP       Dynamic Feedback Protocol
GGSN      Gateway GPRS Support Node
GPRS      General Packet Radio Service
GTP       GPRS Tunneling Protocol
IE        Information Element
IMEI      International Mobile Equipment Identification
IMSI      International Mobile Subscriber Identification
MCC       Mobile Country Code
MNC       Mobile Network Code
MS        Mobile Station
MSISDN    Mobile Station ISDN number
PDP       Packet Data Protocol
PDN       Packet Data Network
PPP       Point-to-Point Protocol
RNC       Radio Network Controller
SGSN      Serving GPRS Support Node

REFERENCE

[1] GSM 03.60: Digital cellular telecommunications
    system (Phase 2+); General Packet Radio Service
    (GPRS); Service description; Stage 2. V7.1.0

[2] GSM 09.60: Digital cellular telecommunication
    system (Phase 2+); General Packet Radio Service
    (GPRS); GPRS Tunnelling Protocol (GTP) across
    Gn and Gp Interface. V7.3.0

[3] 3GPP; Technical Specification Group Services
    and System Aspects; QoS Concept and Architecture.
    3G TS 23.107 v3.2.0.

[4] 3GPP; Technical Specification Group Core Network;
    General Packet Radio Service(GPRS); GPRS
    Tunnelling Protocol (GTP) across Gn and Gp
    Interface (Release 7). 3G TS 29.060 v7.5.1.

[5] 3GPP: Technical Specification Group Core Network;
    Policy control over Go interface (Release 5).
    3GPP TS 29.207 V5.2.0

[6] 3GPP: Technical Specification Group Services and 
   System Aspects; General Packet Radio Service (GPRS);
   Service Description (Release 7) 3GPP TS 23.060 V7.4.0

[7] 3GPP: Technical Specification Group Services and 
    System Aspects; One Tunnel Functional description;
    (Release 7) 3GPP TR 23.809 V1.0.0