Introduction
About This Document
This document describes how to communicate with Secure Card Reader Authenticator (SCRA) devices which implement MagTek Messaging Schema (MMS) and the DynaFlex II Go system architecture.
The document uses bold face to:
Highlight terms / concepts being formally defined in the current sentence / paragraph
Highlight important distinguishing keywords in sentences
Indicate hyperlinks to other sections / tables
The document uses a small number of annotation standards that are important to understand:
Hexadecimal values are prefixed with 0x unless the context clearly indicates an un-prefixed number is hexadecimal (for example, TLV tags, lengths, and values are always assumed to be hex).
Binary values are prefixed with 0b unless the context clearly indicates the value is binary.
Decimal values are not prefixed unless required for clarity, in which case the prefix is 0d.
The standard documented by this document makes extensive use of Tag-Length-Value encoding. Section
Tag-Length-Value (TLV) Encoding describes how to encode and decode TLV, and how to read the tables in this document that describe TLV data objects.
Sections
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