> 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/telecom-concepts/redirect.md).

# Redirect

Some signaling protocols support redirecting calls from one location to another. This is usually done by a redirect server which analyzes incoming call information and then terminates the call while specifying another destination.

Redirections are usually triggered by the following call termination reason codes:

* SIP
  * 300 Multiple Choices
  * 301 Moved Permanently
  * 302 Moved Temporarily
  * 305 Use Proxy
  * 380 Alternative Service
* SS7
  * Q.850 Ported Number (14)
  * Q.850 Number Changed (22)
  * Q.850 Redirection (23)

### TelcoBridges and redirections

[Tctrl 2.7](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/tmedia-tsig-and-tdev-web-portal-2-7-tutorial-guide/README.md) and earlier provides basic support for SIP redirection on the NAP from where the outgoing call originated.

[Tctrl 2.8](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/configuration/tmedia-tsig-and-tdev-web-portal-2-8-tutorial-guide/README.md) and later provides support for various redirection behaviors on signaling protocols that support it. These behaviors are:

* Redirection emission: [Tctrl](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/concepts/tctrl/README.md) can forge a redirection response instead of routing an incoming call using routing scripts.
* Redirection processing: [Tctrl](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/concepts/tctrl/README.md) can process redirection requests through its routing scripts using the specified called or routing numbers. This feature can be used for [LNP](https://telcobridges.com/learning/sip-trunking/number-porting-isps-carriers/) "dipping".
* Relay: The [Tmedia](https://telcobridges.com/media-gateways/products/tmedia-gateways/) or [Tdev](https://telcobridges.com/products/development-platforms-tdev/) unit can be configured automatically relay redirection requests from the outgoing call to the incoming call.
* Drop: The unit can also be configured to drop the request altogether.

### Configuration

* [Redirect configuration](https://github.com/telcobridges-main/tmedia-wiki/tree/main/tmedia/use-cases/use-cases-redirect-configuration/README.md)


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