Tel Link - URL Caller is a Chrome add-on developed by pilotkid2011. It is a free program that falls under the category of Browsers, specifically Add-ons & Tools. This add-on allows users to place a call via a URL, particularly useful with FreePBX servers using a Call.php script.

With Tel Link - URL Caller, users can link TEL: links with a URL, enabling them to easily connect their local PBX server to their computer. By simply clicking on a phone number, it can be linked to the user's desk phone, making calling users or companies quick and convenient.

This add-on is specifically designed for FreePBX servers, but it may also work with other providers. However, the developer's familiarity lies primarily with FreePBX. Tel Link - URL Caller is an open-source project, and interested users can find more information on the developer's GitHub page.