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File name UPG_IP_Technical_Integration_Guide.pdf

TCP/IP Interface Guide Version 2.1.2 07/03/02 For further help telephone +44 (0) 1827 265 005 or email [email protected] г Universal Payment Gateway plc Introduction Universal Payment Gateway's UPGdirect is a real time card processing system that converts the traditional two stage authorisation and payment processes into one convenient `transaction' process. UPGdirect is designed for merchants running EPOS or EFT terminals, either with or without store controllers, and merchants running call centres. UPGdirect can be accessed via dial-up telephone - analogue PSTN or ISDN, leased line using either TCP/IP or X.25 protocols or secure Internet via https or IPSEC 3DES VPN. This document is aimed at those who wish to write systems that communicate with UPGdirect using TCP/IP. Typically these will be EPOS terminal manufacturers and software companies that write call centre systems. Before you begin, you should be familiar with the concepts of IP sockets. If you wish to communicate with UPGdirect using X.25 you will need a copy of the UPGdirect X.25 Interface Guide. For further help telephone +44 (0) 1827 265 005 or email [email protected] 1 Sequence of Events For those communicating with UPGdirect using dial-up connections For those communicating with UPGdirect using leased line or secure Internet connections Dial one of UPG's 0800 telephone numbers Authenticate using user name and password (not necessary for authorisation only) Open an IP socket connection to the UPGdirect server using the remote host address and port number Open an IP socket connection to the UPGdirect server using the remote host address and port number Send transaction message as either UPG or APACS Standard 30 format Send transaction message as either UPG or APACS Standard 30 format Wait for transaction response message Wait for transaction response message Close the IP socket connection Close the IP socket connection Clear the dial-up call For further help telephone +44 (0) 1827 265 005 or email [email protected] 2 General Communication Procedure Communicating with UPGdirect using dial-up connections 1. If your EPOS terminal or computer uses a modem or ISDN terminal adapter (TA), use Dialup Networking or equivalent to dial the primary UPGdirect 0800 telephone number. If you are doing one-shot transactions, you will have been issued with a user name and password when your 0800 numbers were assigned by UPG. If your EPOS terminal or computer uses a router, you will normally use the router's dial-ondemand functionality and configure it with the UPGdirect 0800 telephone number, user name and password if appropriate. If a line busy or line unobtainable tone is obtained, you must make two further attempts using the primary 0800 number before using your secondary 0800 telephone number. 2. Once your modem, TA or router has successfully authenticated with UPGdirect, you will need to establish an IP socket co