M3UA seamlessly transports SS7 MTP3 user part signaling messages over IP using SCTP. M3UA-connected IP endpoints do not have to conform to standard. MTP 3 User Adaptation Layer (M3UA). Member of the SIGTRAN protocol family. XXX – add a brief M3UA description here. The following SIGTRAN protocols in this section: IUA. M2PA, MTP2 User Peer-to- Peer Adaptation Layer. M2UA, MTP2 User Adaptation Layer. M3UA, MTP3.

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Legal and Privacy site by zytrax web-master at zytrax Page modified: One address is designated as the primary address to receive data. Message class The values for message class can be any of the following:.

It is sent by the initiator of an association to its peer to complete the initialization process. Version The version field contains the version of the M2UA adapation layer. Version Contains the version of the IUA adaptation layer. The parameter field contains the time values.

Message Classes and Types The following list contains the valid message classes:.

RFC – Signaling System 7 (SS7) Message Transfer Part 3 (MTP3) – User Adaptation Layer (M3UA)

It uses two extra variable parameters: This includes message transfer between the following: Problems, comments, suggestions, corrections including broken links or something to add? Data chunks are not bundled with the abort, control chunks may be bundled with an abort, but must be placed before the abort in the SCTP datagram or they will be ignored.


Each IPSP must have its own point code. A single IP port number is used across the entire address list at an endpoint for a specific session. SCTP uses periodic heart-beat messages to confirm the status of each end point. The variable-length parameter format is as j3ua.

M3UA format of variable-length parameters. You could, at no charge, upgrade to a W3C standards compliant browser such as Firefox. The INIT chunk contains the following parameters.

MTP 3 User Adaptation Layer (M3UA)

Endpoints that do not receive desired vendor specific information should make an attempt to operate n3ua it, although they may do so and report they are doing so in a degraded mode.

Reserved This field should be set to zero. This chunk precedes any Data chunk sent within the association, but may be bundled with one or more Data chunks in the same SCTP datagram.

User Data Link Status. The message class The following message classes are available:. Variable-length parameter format M2UA messages consist of a common header described above followed by zero or more variable-length parameters, as defined by the message type.

The Selective ACK also contains zero or more fragment reports. Number of Inbound Streams.

Each IP node does not require a point code. Message length The message length defines the length of the message in octets, including the common header.

The format of variable-length parameters is as follows:. There may also be operational cost and performance advantages when traditional signaling links are replaced by IP network pgotocol.

M3UA – The Wireshark Wiki

This is dependent on the chunk ID. Version The version field contains the version of the M3UA adapation layer. Number of Outbound Streams.


The following list protcool the message names for the defined messages. M2UA format of variable-length parameters. The architecture that has been defined for SCN signaling transport over IP uses multiple components, including an IP transport protocol, a signaling common transport protocol and an adaptation module to support the services expected by a particular SCN signaling protocol from its underlying protocol layer.

The parameter fields contain the time values.

Tech Stuff – SIGTRAN (SS7 over IP)

A standard IP layer. It contains one or more error causes.

The design of SCTP includes appropriate congestion avoidance behaviour and resistance to flooding and masquerade attacks. SG can have upper SS7 layers, e. The following is the format of the SCTP header:. Please take the time from a busy proocol to ‘mail us’ at top of screenthe webmaster below or info-support at zytrax.

SG is not an SS7 node and has no point code. Chunk Flags The type of chunk flag as defined in the chunk ID defines whether these ptotocol will be used. Chunk Value This field contains the actual information to be transferred in the chunk. Network service providers are designing all IP architectures which include support for SS7 and SS7-like signaling protocols.