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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MTP3 routes the message back to the origination SP. SG’s single function is to relay MTP3 messages. The following is the format of the SCTP header:. Endpoints not equipped to interpret the vendor-specific chunk sent by a remote endpoint must ignore it.

Both transport MTP3 messages. If you are happy it’s OK – but your browser is giving a less than optimal experience on our site.

Spare This field should be set to zero. The following list contains the message names for the defined messages. It offers the following services to its users:. A single IP port number is used across the entire address list at an endpoint for a specific session. The INIT chunk contains the following parameters. 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 Responder Cookie proocol the Unrecognized Parameter. Verification Tag The receiver of this 32 bit datagram uses the Verification tag to identify the association.

A device that converts from one protocol to another. Each user application might be assigned its own stream virtual connection. This parameter therefore acknowledges receipt of all TSNs up to and including the value given. It can be used j3ua the receiver, in combination with the source IP Address, to identify the association to which this datagram belongs.


MTP3 routes from point code to point code.

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

Parameter tag The Parameter tag identifies the type of parameter. Network service providers are designing all IP architectures which include support for SS7 and SS7-like signaling protocols. You will have a warm inner glow for the rest of the day. It is sent by the initiator of an association to its peer to complete the initialization process. The supported version is 1 Release 1.

M2UA format of variable-length parameters. Parameter length Parameter length indicates the size of the parameter in bytes.

Tech Stuff – SIGTRAN Introduction

On transmit, the value of this Verification tag must be set to the value of the Initiate tag received from the peer endpoint during the association initialization. The message class The following message classes are available:.

Endpoints that do not receive desired vendor specific information should make an attempt to operate without it, although they may do so and ,3ua they are doing so in a degraded mode. You could, at no charge, upgrade to a W3C standards compliant browser such as Firefox.

This is dependent on the chunk ID. The variable-length protool format is as follows:. The protocol consists of a common message header followed by parameters as defined by the message type.


This protocol can also support transport of SCCP-user messages between two endpoints wholly protoco within an IP network. There may also be operational cost and performance advantages when traditional signaling links are replaced by IP network “connections”.

IP provides an effective way to transport user data and for operators to expand their networks and protodol new services. Chunk Flags The type of chunk flag as defined in the chunk ID defines whether these bits will be used. Parameter value The value of the parameter. SUA can enhance the efficiency of the network and provides a means for simpler implementations. SG is not an SS7 node and has no point code. In these networks, there may be some need for interworking between the SS7 and IP domains.

M3UA Protocol

Reserved This field should be set to zero. Chunk Value This field contains the actual information to be transferred in the chunk. It contains one or more error causes. Version The version field contains the version of the M2UA adapation layer.

Message Length The Message Length defines the length of the message in octets, including the header. The M2UA header structure is as follows: The parameter field contains the time values.

Does not need SCCP services, reducing the complexity of the node and thereby reducing cost. Unless otherwise noted, each parameter is only be included once in the INIT chunk.