Cisco Cisco IOS Software Release 12.4(2)XB6

New and Changed Information, page 12

Caveats, page 16

Related Documentation, page 43

Implementing GGSN Release 10.x on the Cisco SAMI, page 45

Obtaining Documentation and Submitting a Service Request, page 46

The Cisco GGSN is a service designed for Global System for Mobile Communications (GSM) networks. 
GSM is a digital cellular technology that is used worldwide, predominantly in Europe and Asia. GSM is 
the world's leading standard in digital wireless communications. 

General Packet Radio Service (GPRS) and Universal Mobile Telecommunication System (UMTS) are 
standardized by the European Telecommunications Standards Institute (ETSI). In a GPRS/UMTS 
packet-switched domain, data services are delivered to the mobile subscriber when a link is established 
through a Public Land Mobile Network (PLMN) to a GGSN. 

The Cisco GGSN enables mobile wireless service providers to supply their mobile subscribers with 
packet-based data services in GSM networks.

The Cisco GGSN runs on the Cisco Service and Application Module for IP (SAMI), a new-generation 
high performance service module for the Cisco 7600 series router platforms. For more information about 
the Cisco SAMI, see the Cisco Service and Application Module for IP User Guide.

This section describes the system requirements for Cisco IOS Release 12.4(24)YE releases and includes 
the following sections:

Memory Recommendations, page 2

Hardware and Software Requirements, page 3

Determining the Software Version, page 4

Upgrading to a New Software Release, page 4

For hardware requirements, such as power supply and environmental requirements and hardware 
installation instructions, see the 

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Cisco SAMI/ 
Cisco 7600 

GGSN Standard 
Feature Set

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RAM