Cisco Cisco Packet Data Gateway (PDG) Documentation Roadmaps
GGSN Support in GPRS/UMTS Wireless Data Services
▀ How GGSN Works
▄ Cisco ASR 5000 Series Product Overview
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Figure 90. Non-Transparent IP Session Call Flow
1. The Mobile Station (MS) goes through the process of attaching itself to the GPRS/UMTS network.
2. The Terminal Equipment (TE) aspect of the MS sends AT commands to the Mobile Terminal (MT) aspect of the
2. The Terminal Equipment (TE) aspect of the MS sends AT commands to the Mobile Terminal (MT) aspect of the
MS to place it into PPP mode.
The Link Control Protocol (LCP is then used to configure the Maximum-Receive Unit size and the
authentication protocol (Challenge-Handshake Authentication Protocol (CHAP), Password Authentication
authentication protocol (Challenge-Handshake Authentication Protocol (CHAP), Password Authentication