DIGITAL PRODUCTS COMPANY IMPORTANT INFORMATION: This business has permanently closed. Dec-31-2020: After over twenty years of serving the telecom industry Digital Products Company has permanently closed. Product sales and service has been discontinued. Live support is no longer offered and product marketing has ended. The information on this site is for temporary document archival purposes. All information may be removed without further notice. Please use the links shown below to download archived product information and instruction manuals. Instruction Manuals Download product instruction manuals. Ring-It! Two-Line Telco Simulator Low cost telco simulator for personal and professional use. Caller-ID, E-911 training mode, and External Audio Jacks. Discontinued: No longer available. LineMan Two-Line Telco Simulator Entry level price, professional features. Introductory pricing. E-911 training mode, and Audio Output Jack. Discontinued: No longer available. Party-Line Six-Extension Telephone Line Simulator Popular features at an affordable price. Six extensions, Distinctive Ringing, and Caller-ID. Discontinued: No longer available. USA www.digitalproductsco.com © 1998-2020, All rights reserved. Specifications subject to change without notice.Last update Dec-31-2020.