> 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/interworking.md).

# Interworking

[SCCP](https://github.com/telcobridges-main/tmedia-wiki/tree/main/reference/protocols/sccp/README.md) supports interworking between various ITU-T variants (1988, 1992, and 1996) as described in the Q.715 ITU-T Specification.

From the point of view of the SCCP user, there is only one SCCP. It is the responsibility of the SCCP to take all the necessary measures to select the correct message types to be sent out and to segment messages, if necessary. Hence, at certain interworking nodes, a capability needs to be provided that allows conversion of the new message types (LUDT7, LUDTS7) to XUDT, XUDTS message types provided in the 1993 edition, therefore allowing the segmenting of a LUDT message into multiple XUDT messages (or possibly multiple LUDT messages if the destination understands them), or truncating a long LUDTS to fit into a single XUDTS message, if necessary.

**NOTE:** As of August 2009, LUDT and LUDTS are not supported.


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