> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/protocols/sigtran-implementation.md).

# SIGTRAN Implementation

TelcoBridges' implementation of [SIGTRAN](https://telcobridges.com/media-gateways/solutions/signaling/migrating-ss7-sigtran/) is based on the concept of SS7 relay and termination.

The relay concept is where the SS7 signaling received from MTP2 links is forwarded directly to SIGTRAN peer(s).

![Sigtran Relay](https://docs.telcobridges.com/w/images/9/93/Sigtran_Relay.jpeg)

SIGTRAN is used to RELAY SS7 signaling to the peer using either M2UA or M3UA-SG, without local processing of SS7 messages.

A termination corresponds to a link between two unique end-points. An example is provided below.

![Sigtran Termination](https://docs.telcobridges.com/w/images/7/7b/Sigtran_Termination.jpeg)

The SIGTRAN termination is used to receive SS7 signaling on the gateway for local processing (ISUP,SCCP,MTP3 routing).

### Other details

* The SIGTRAN Relay software license enables up to 64 M2UA links, 20 M3UA-SG links and 64 IUA links. (SS7 links must be purchased separately)
* The SIGTRAN Termination software license enables up to 64 M2PA links and 20 M3UA-IPSP links.

### References

* [SIGTRAN](https://telcobridges.com/media-gateways/solutions/signaling/migrating-ss7-sigtran/)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://prosbcdocs.telcobridges.com/telecom-references/protocols/sigtran-implementation.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.