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PDP type in GPRS - IPv4, IPv6, IPv4v6 - Mobile Packet Core Session Management
The MS puts the requested 'PDP type' in the 'PDP activation request' sent to the SGSN in 'PDP context activation' procedure. The SGSN will compare the requested PDP type against the subscription data in the HLR, and will take a decision based on the following table,
Mohamed Salem