> For the complete documentation index, see [llms.txt](https://docs.payfacto.com/payfacto-knowledge/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payfacto.com/payfacto-knowledge/uk-and-intl/applications/securepay/use-the-stpi-secure-installer-to-install-the-rti-sipa-plugin/installation-process-overview.md).

# Installation Process Overview

## Installation Process Overview

Here is a quick overview of the entire installation and setup process:

1. Install/enable Microsoft .NET Framework 3.5 SP1.
2. Install the latest version of Oracle’s Java for Windows.
3. Use the STPISecure to installer to install the RTI-SIPA plugin.
4. Configure your POS System.
5. Connect, power up and configure payment terminals.

***

### Before you begin

By default, the payment terminals using SecurePay will communicate with the POS system over TCP port 9999.

* Open TCP port 9999 on the corporate firewall.
* Open TCP port 9999 on the Windows Defender Firewall on the POS system's Back-Office as well as on all POS workstations.
* The wireless network (for wireless payment terminals) needs to be able to communicate with the POS System.
* Each payment terminal needs access to the Internet.