M3UA

The M3UA (Message Transfer Part 3 User Adaptation Layer) layer can be used in 2 ways, either to extend an MTP3link or to replace the MTP3 and MTP2 layers entirely.

FIGURE 1:

FIGURE 2:

When used in Toolpack, the M3UA layer can be configured to interface with either a NIF or ISUP/SCCP layer.

TelcoBridges and M3UA

TelcoBridges supports M3UA as part of its support for SIGTRAN.

References

• Article at Protocols.com
• Wikipedia article
• RFC 4666 Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) - User Adaptation Layer (M3UA)