Not sure whether you have a response yet.
In the past IOG3, IOG11 and IOG20 were the main IO
for AXE10. Variants of APG is now the main IO.
For X25, the IOG used MTP/X25. A X25 Network is required.
Triple X protocols (X3/25/29) will be used.
VBR/ Wallis Dudhnath