Check the listing for details. Norstar Plus Modular ICS 1.1 Installer Guide. Condition: Used. Listed at 15.68 USD. This installer guide is specifically designed for the Norstar Plus Modular ICS 1.1 phone switching system. It provides detailed instructions on how to install and configure the system, along with helpful tips and tricks for getting the most out of your phone system. Whether you're a seasoned professional or a beginner, this guide will help you get started on the right foot. With a focus on the Norstar ICS series, this guide covers all aspects of the phone system, including the Mostar Plus model. It's perfect for anyone looking to install and customize their phone system, and is an essential resource for anyone who wants to get the most out of their investment. So why wait? Order your copy today and start enjoying the benefits of a Norstar Plus Modular ICS 1.1 phone switching system!