M3UA (MTP-3 User Adaptation Layer) is a protocol for supporting the transport of SS7 MTP-3 User Signaling (e.g. ISUP or SCCP messages) over IP using the services of the Stream Control Transmission Protocol (SCTP). Also, provision is made for protocol elements that enable a seamless operation of the MTP-3 User peers in the SS7 and IP domains. This protocol would be used between Signaling Gateway (SG) and Media Gateway Controller (MGC) or IP-Resident Database, or between two IP-based applications. It is assumed that SG receives SS7 signaling over a standard SS7 interface using the SS7 message Transfer Part (MTP) to provide transport.
Sure Speed M3UA is a high performance implementation of M3UA protocol (RFC 4666, RFC 3332). It is based on our proprietary Sure Speed framework that ensures a high level of performance for all our protocol implementations.


  • Supports functionality specified in RFC 3332, RFC 4666
  • Designed to be transport layer independent. It can be easily used over SCTP, TCP, UDP or any other transport layer like UDPLite
  • SIGTRAN is being used in GSM/UMTS networks also, apart from other SS7 networks
  • In built memory manager for avoiding any memory allocations during run time
  • Can be easily compiled over SOLARIS, LINUX and other UNIX like OSes
  • Sample Application runs over SCTP and UDP. SCTP used is LK-SCTP
  • Supports ASP,SGP & IPSP mode of communication
  • Multiple ASP in single AS, Multiple SGP in single SG
  • Single ASP serving multiple AS
  • IPSP-IPSP mode of communication supported with both single exchange & dual exchange support
  • Network Appearance, Routing Context, Traffic Mode can be excluded from ASPTM, SSNM,TRAFFIC messages
  • Multiple ASP and SGP can be configured simultaneously.
  • Supports single as well as multiple threaded environment.
  • A highly efficient design has been used to minimize the latency involved in processing M3UA TRANSFER procedure.

Visit our download section for downloading Programming Manual & Demo Application.

Sure Speed M3UA is feature rich and highly scalable to fulfill requirements of modern telecommunication networks. Following are delivered as part of Sure Speed M3UA Software Package:

  • Software Library
  • Technical support; Immediate patch releases for bugs
  • Programmer's manual
  • Demo applications (working ASP, SGP & IPSP examples)

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