M2UA

The M2UA (Message Transfer Part 2 User Adaptation Layer) is use to interface MTP2 of the SG to the MTP3 of a MGC. M2UA can also be seen as way to extend a MTP2 link. An M2UA link is always bind to an MTP2 link.

Here is a diagram of a setup using M2UA:

As you can see the M2UA layer can be interface with either NIF or MTP3. Therefore M2UA has 2 modes of operation. Toolpack can configure M2UA in both modes.