Dialo 1.4 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This program is a product of Microsys Com Ltd. We recommend checking the downloaded files with any free antivirus. Dialo belongs to System Utilities.
From the developer:
Dialo is a call manager, allowing you to select and dial any phone number directly from your PC. It works with Cisco IP phones connected to your local network and it can send several commands such as dial, end, hold on each extension you select.
You may want to check out more software, such as Line 6 Monkey, which might be similar to Dialo.