RFC Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) – User Adaptation Layer (M3UA), September Canonical URL. RFC (part 1 of 5): Signaling System 7 (SS7) Message Transfer Part 3 ( MTP3) – User Adaptation Layer (M3UA). M3UA Overview. Protocol Architecture. Services Provided by the M3UA Layer. Support for the Transport of MTP3-User Messages. Full.

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Failover – The capability to reroute signalling traffic as 4666 to an alternate Application Server Process, or group of ASPs, within an Application Server in the event of failure or unavailability of a currently used Application Server Process. The provisioning and configuration of the SS7 network determines the restriction placed on the maximum block.

This is to take advantage of various SCTP features, such as: However, in the case where an ASP rrc connected to more than one SG, the M3UA layer at an ASP should maintain the status of configured SS7 destinations and route messages according to the availability and congestion status of the routes to these destinations via each SG.

Message Classes and Types Layer Management – Layer Management is a nodal function that handles the inputs and outputs between the M3UA layer and a local management entity. Note that there is a 1: Linkset – A number of signalling links that directly interconnect two signalling points, which are used as a module.

M3UA RFC.4666 – SS7 MTP3 User Adaptation Layer

Routing Context – A value that uniquely identifies a Routing Key. Please refer to the current edition of the “Internet Official Protocol Standards” STD 1 for the standardization state and status of this protocol.


Table of Contents 1. It serves as an active, backup, load-sharing, or broadcast process of a Signalling Gateway. This document obsoletes RFC The M3UA layer at an ASP keeps the state of the routes to remote SS7 destinations and may initiate an audit of the availability and the restricted or the congested state of remote SS7 destinations.

Receipt of Primitives from the Layer Management Routing Contexts and Routing Keys This can be achieved using the. An SG contains a set of one or more unique Signalling Gateway Processes, of which one or more is normally actively processing traffic.

The delivery mechanism should meet the following criteria: Signalling Process – A process instance that uses M3UA to communicate with other signalling processes. Managing Routing Contexts and Routing Keys Signalling Gateway SS7 Layers Network Working Group K.

M3UA – Wikipedia

The AS contains a set of one or more unique Application Server Processes, of which one or more is normally actively processing traffic. Definition of M3UA Boundaries However, in the context of an SG, the maximum octet block size must be followed when interworking to a SS7 network that does not support the transfer of larger information blocks to the final destination. Message Distribution at the ASP Signaling Transfer Point STP – A node in the SS7 network that provides network access and performs message routing, screening and transfer of signaling messages.


Distribution of this memo is unlimited. Message Distribution at the SGP Routing Context values are configured either using a configuration management interface, or by using the routing key management procedures defined in this document. Signalling Point Code Representation Network Byte Order – Most significant byte first, a.

An example scenario is where an SG appears as an. Protocol Architecture The framework architecture that has been defined for SCN signalling transport over IP [ rfcc ] uses multiple components, including a common signalling transport protocol and an adaptation module to support the services expected by a particular SCN signalling protocol from its underlying protocol layer.

Stream – An SCTP stream; a unidirectional logical channel established from one SCTP endpoint to another associated SCTP endpoint, within which all user messages are delivered in-sequence except for those submitted to the unordered delivery service.

Examples of M3UA Procedures Routing Key Management Procedures [Optional] Routing Key – A Routing Key describes a set of SS7 parameters and parameter values 44666 uniquely define the range of signalling traffic to be handled by a particular Application Server. Failover also applies upon the return to service of a previously unavailable Application Server Process.