Send Routing Information for GPRS Request/ Response

GTP-C

Sent by the GGSN to obtain location information for the MS. This message type contains the IMSI of the MS and Private Extension.

Failure Report Request/ Response

GTP-C

Sent by the GGSN to the HLR when a PDU reject message is received.

The GGSN requests the HLR to set the flag and add the GGSN to the list of nodes to report to when activity from the subscriber that owns the PDP address is detected.

The message contains the subscriber IMSI and Private Extension

Note MS GPRS Present Request/ Response

GTP-C

When the HLR receives a message from a mobile with MDFG

set, it clears the MDFG and sends the Note MS Present message to all GGSN’s in the subscriber’s list.

This message type contains subscriber IMSI, GSN Address and Private Extension