External Message types

2.1 Protocol

The interface to NCS will be over TCP/IP. The application data will be prefixed by a 2-byte length header field (Binary) indicating the length of the application data to follow.

2.2 Bitmap

NCS supports ASCII ISO bitmap representations. ASCII ISO bitmap representation is either 16 or 32 byte representation of the bitmap in Hex.

2. 3 Supported Message Type

Message type codes are used to identify the general function of messages, and one

Message type code is required in each message. NCS supports the message types shown in the following table for both inbound and outbound messages. The message types in the table are divided according to the ISO standard message classes.

Message Class	Type	Description
Authorization	0100	Authorization Request
	0110	Authorization Response
	0120	Authorization Advice
	0130	Authorization Advice Response
Financial Transaction	0200	Financial Transaction Request
	0202	Financial Transaction Completion
	0210	Financial Transaction Response
	0212	Financial Transaction Completion Response
	0220	Financial Transaction Advice
	0230	Financial Transaction Advice Response
Reversal	0420	Reversal Advice
	0421	Reversal Advice Repeat
	0430	Reversal Advice Response
Network Management	0800	Network Management Request
	0810	Network Management Request Response