• Rec. ITU-T F.220 (1988) – Service requirements unique to the processable mode number one (PM1) used within the teletex service
  • CONTENTS
  • 1 Introduction
    • 1.1 Scope
    • 1.2 Definition
  • 2 Description
    • 2.1 General
    • 2.2 Characteristics of a PM1 interchanged document
    • 2.3 Communication aspects
    • 2.4 Equipment characteristics
  • 3 Intercommunication with other services
  • 4 Quality of service
  • 5 Customer's information
    • 5.1 Directories