What's New in This Guide

This section introduces the documentation updates for Release 9.1.0.0.0.

Release 9.1.0.0.0 - G17539-02, January 2025

Added a note in the Table 2-* to provide information about NDGT.

Release 9.1.0.0.0 - G17539-01, December 2024

• Added a note about
• Updated step 6 and added steps 7, 8, and 9 in the "velocity check in test mode" in the Call Flow in Test Mode section to provide information about neighboring countries and ATI ACK.
• Added a sub point to step 9 of the "velocity check in learning mode" in the Call Flow in Learn Mode to provide information about ATI ACK.
• The following updates are done in the Velocity Check section:
  • Added a note about SGSNLastTS and vlrLastTS fields for the subscribers moving from 4G to 3G or 2G in the section.
  • Updated step 4 of the "vSTP call flow - when IMSI record is found in common DB".
  • Added Verifying Aging of UDR Look Up Record.
  • Updated the first step of the velocity check in active mode section to provide information about neighboring countries.