Plain-language definition
The SIGTRAN layer that carries SCCP over IP as if over MTP3.
Technical definition
M3UA presents MTP3 primitives to SCCP while transporting over SCTP; nodes act as ASP, SGP or IPSP and exchange routing contexts and point codes.
Why it matters
M3UA associations are the standard way an SMSC or firewall connects to an operator STP.
Last reviewed 2026-09-12 by the Guardivia QoS Engineering Team. Product facts on this page describe current capabilities; items marked “where supported”, “optional”, “integration” or “consultancy” are confirmed per deployment.