? Subscriber data transfer is possible only when
the PDP Context is activated
MS, SGSN, GGSN

? PDP Context is activated per PDP address

? PDP context contains mapping and routing
information in MS, SGSN & GGSN

Enables data
transfer between MS and GGSN

? PDP Context Activation initiated by the MS Request from
application/TE via PPP protocol or AT command