STANDARD 70 - BOOK 4

CARD ACCEPTOR TO ACQUIRER INTERFACE STANDARDS

Communications

UK Payments Administration (October 2009)

FOREWORD

INTRODUCTION

1 SCOPE

2 NORMATIVE REFERENCES

3 TERMS AND DEFINITIONS

4 SYMBOLS (AND ABBREVIATED TERMS)

4.1 Control characters

4.2 Abbreviated terms

5 DATA COMMUNICATIONS PROTOCOL FOR REAL TIME MESSAGES

5.1 General

5.2 PSTN

5.2.1 General

5.2.2 Physical layer

5.2.3 PSTN using TPAD

5.2.3.1 General

5.2.3.2 PAD Functions

5.2.3.3 TPAD Timers & Recoveries

5.2.3.4 Establishment of connection and data link

5.2.3.5 Information transfer

5.2.3.6 Termination and clearing of connection

5.2.4 PSTN using ITU-T X.28

5.3 ITU-T X.25 over ISDN B channel

5.3.1 General

5.3.2 Protocol description

5.3.3 Terminal adaptor configuration issues

5.3.4 Establishment of connection and data link

5.3.4.1 General

5.3.4.2 Circuit switched call

5.3.4.3 ITU-T X.25 virtual call

5.3.5 Information transfer

5.3.6 Termination and clearing of the connection

5.4 ITU-T X.25 over leased line

5.4.1 General

5.4.2 Establishment of connection and data link

5.4.3 Information transfer

5.4.4 Termination and clearing of the connection

5.5 IP over ISDN B channel

5.5.1 General

5.5.2 Access parameters

5.5.3 Physical layer

5.5.4 Establishment of connection and data link

5.5.5 Session establishment

5.5.6 Information transfer

5.5.7 Termination and clearing of connection

5.6 IP over Public Networks

5.6.1 General

5.6.2 Encryption and security requirements

5.6.3 Secure Sockets Layer/Transport Layer Security

5.6.3.1 General

5.6.3.2 Implementation

5.6.3.3 Access Parameters

5.6.3.4 Establishment of Connection and Data Link - SSL/TLS

5.6.3.5 Information Transfer

5.6.3.6 Termination and Clearing of Connection

5.6.4 IPSec

6 DATA COMMUNICATIONS PROTOCOL FOR POST-EVENT BATCH MESSAGES

6.1 General

6.1.1 Physical interface

6.1.2 Link protocol

6.1.3 Higher level control

6.1.4 Communications profiles

6.1.5 Profile definitions

6.1.6 CRC block protection

6.2 Implementation via PSTN

6.2.1 General

6.2.2 Physical interface

6.2.3 Error correction

6.2.4 Timing specifications

6.2.5 Establishing a connection

6.2.6 Termination of the connection

6.2.7 Example sessions

6.3 Implementation via a packet radio ITU-T X.25 data network

6.3.1 General

7 THE TREATMENT OF THE ITU-T X.25 M BIT