# Add Contents to Knowledge Base

A knowledge base is a central store of reference material that your AI receptionists consult in real time while a call is in progress. Populate it with the things a receptionist needs to answer questions accurately, such as answers to frequently asked questions (FAQs) and product details, by uploading files or pointing to web pages. Once the knowledge base is assigned to a receptionist, it can pull from that material whenever a caller asks something it covers.

:::caution
An AI receptionist works from the text it can read, so images and heavily formatted layouts often do not come across cleanly and can weaken its answers. You will get the best results from plain, well-structured text. Break content into concise sections under clear headings so the receptionist can locate the right passage quickly.
:::

## Limits

A single knowledge base holds up to **200** content entries in total, counting both files and URLs.

## Two ways to add content

You can build up a knowledge base by uploading files from your computer, by adding URLs to online pages, or by mixing both. The sections below cover each method.

## Add content by uploading a file

Uploading a document puts its full text directly into the knowledge base. For instance, if you upload a product's PDF manual, the receptionist can answer detailed questions straight from the official documentation.

Each file you upload must meet these requirements:

| Item | Requirement |
| --- | --- |
| File size | Up to 10 MB per file. |
| File type | PDF, TXT, DOCX, HTML, or EPUB. |

To upload one or more files:

1. Sign in to the PBX (Private Branch Exchange, your phone system) web portal and go to **AI > AI Receptionist > Knowledge Base**.
2. Click **Upload File**.
3. In the file picker, choose the file or files you want, then click **Open**.

   :::note
   You can select up to **10** files in a single upload.
   :::

   The upload starts automatically.

When the upload finishes, each file appears as an entry in the knowledge base list. Select an entry to review the text that was extracted from it.

![Cloud Voice, an uploaded file's entry showing the text extracted from the document](/images/pbx/file-details-in-kn.png)

## Add content by adding a URL

Adding a URL lets a receptionist reach out to an online page and read from it. This suits sources that change often, such as an FAQ page you keep up to date on the web.

Before you add URLs, note the following:

- The receptionist reads only the exact page at the URL you give it. It will not follow or crawl the links on that page to gather content from elsewhere. If you need material that spans several pages, add each page as its own URL.

:::caution
URL content is captured once, not kept in sync. If the linked page changes, the receptionist keeps answering from the old text until you add the URL again. Re-add any URL whose page you have updated so callers get the current information.
:::

To add one or more URLs:

1. Sign in to the PBX web portal and go to **AI > AI Receptionist > Knowledge Base**.
2. Click **Add URL**.
3. In the dialog that opens, fill in the URL details.

   :::note
   You can add up to **10** URLs at once.
   :::

   ![Dialog for entering a name and web address to add a URL to the knowledge base](/images/pbx/add-url-to-kb.png)

   a. Enter the URL information.

      | Setting | Description |
      | --- | --- |
      | Name | A label that helps you recognize the URL later. |
      | URL | The web address of the content, which must begin with `https://`. |

   b. To include another page, click **Add** and fill in its details.

   c. Click **Save**.

Cloud Voice reads the content from each URL and adds it to the knowledge base. Select an entry to review the extracted text.

![Cloud Voice, a URL entry showing the content parsed from the linked page](/images/pbx/kb-details.png)