PTA12-000 POTS Telephone AdapterSM55-1 Installation and Operation ManualInstallation and Operation Manual Page iiiENG-FORM: 820-0115.DOTCONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.Table of ContentsSection Title Page1. Description1.1 Introduction 1-11.2 Product Description 1-11.3 Design Features 1-11.4 Specifications 1-11.4.1 Electrical Specifications 1-11.4.2 Physical Specifications 1-31.4.3 Environmental Specifications 1-42. Installation2.1 Introduction 2-12.2 Unpacking and Inspection 2-12.2.1 Warranty 2-12.3 Continued Airworthiness 2-12.4 Installation Procedures 2-12.4.1 Warnings 2-22.4.2 Cautions 2-22.4.3 Cabling and Wiring 2-22.4.4 Post-Installation Checks 2-32.5 Adjustments and Connections 2-42.6 Accessories Required But Not Supplied 2-52.7 Installation Drawings 2-53. Operation3.1 Introduction 3-13.2 General Information 3-13.2 General Information 3-13.3 Controls and Indicators 3-13.3.1 Keypad Controls 3-1