# Page Not Found

The URL `files/EvEfeoPhq9KqtlwdYGKx` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [The Advantages of PortSIP PBX vs. Other PBXs](https://support.portsip.com/portsip-communications-solution/the-advantages-of-portsip-pbx-vs.-other-pbxs.md)
- [High Availability (v16.x)](https://support.portsip.com/v16.x-maintenance-mode/high-availability-v16.x.md)
- [Mobile Push Notifications](https://support.portsip.com/development-portsip/mobile-push-notifications.md)
- [WSI: Pub/Sub](https://support.portsip.com/development-portsip/going-real-time-with-portsip-pbx-pub-sub.md)
- [Click to Call](https://support.portsip.com/apps-guides/portsip-one-desktop-app/click-to-call.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://support.portsip.com/portsip-communications-solution/the-advantages-of-portsip-pbx-vs.-other-pbxs.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://support.portsip.com/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://support.portsip.com/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., `/portsip-communications-solution/the-advantages-of-portsip-pbx-vs.-other-pbxs.md`).

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