Plain-language definition
A message delivered to a handset.
Technical definition
MT SMS is delivered by the SMSC after an SRI-SM query to the HLR returns the serving MSC or SGSN; the SMSC sends MAP MT-ForwardSM to that node, which pages and delivers to the UE.
Why it matters
MT delivery is where home routing, store-and-forward and firewall screening of inbound traffic take place.
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.