# Page Not Found

The URL `files/Rs13dtAcTb1IKhrAAX2j` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [Use Opentact for SIP Trunking](https://doc.opentact.org/sip-trunking/use-opentact-for-sip-trunking.md)
- [<Callback/>](https://doc.opentact.org/opentact-call-xml/less-than-callback-greater-than-1.md)
- [</Gather>](https://doc.opentact.org/opentact-call-xml/less-than-callback-greater-than.md)
- [Stir Shaken](https://doc.opentact.org/regulatory-compliance/stir-shaken.md)
- [Call Initiated](https://doc.opentact.org/wss-events/wss-events/call-initiated.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://doc.opentact.org/sip-trunking/use-opentact-for-sip-trunking.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://doc.opentact.org/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://doc.opentact.org/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/sip-trunking/use-opentact-for-sip-trunking.md`).

You may also use `Accept: text/markdown` header for content negotiation.