Messaging Bank With ISO 8583

 

Message Type Identifier

Each message that is sent must have the id to distinguish the type transactions.

Table 1 Message Type  Identifier

MTI	Functions
2100	Request Of Inquiry
2110	Response Of Inquiry
2200	Request Of Payment
2210	Response  Of Payment
2400	Reversal Request
2401	Repeat Reversal
2410	Reversal Response
2800	Network Management Request
0810	Network Management Response

 

Bit Map

All messages are variable length, with a bit-map scheme used to indicate the presence or absence of additional fields in the message. Each bit-map is a 64-bit string contained within an 8-byte field. The first bit in each bit-map is set to „1‟ or „0‟ to indicate the presence („1‟) or absence („0‟) of an additional 64-bit bit-map field, which immediately follows the preceding bit-map field.

A maximum of 2 bit-maps are used in message formats: a „Primary‟ and a „Secondary‟ bit-map. Bits sets to „1‟ or „0‟ in the Primary bit-map indicate the presence or absence of Data Element 1 through Data Element. 64. Bits sets to „1‟ or „0‟ in the Secondary bit-map indicate the presence or absence of Data Element 65 through Data Element 128. (Note: all bit positions are interpreted from left to right within each bit map; i.e., within the Primary bit-map the left-most bit is “Bit 1”, and the rightmost bit is “Bit 64.”)

Data Element

Table 2 Abbreviation Meaning

No.	Abbreviation	Meaning
1.	a	Alpha, including blanks
2.	n	Numeric  values only
3.	s	Special character only
4.	an	Alphanumeric
5.	as	Alpha and Special character only
6.	ns	Numeric  and Special character only
7.	ans	Alphabetic, Numeric and Special character
8.	b	Binary data
9.	z	Tracks 2 and 3 code set as defined  in ISO/IEC  7813 and 4909
10.	.or..or…or	Variable field length indicator, each. Indicating a digit.
11.	x or xx or xxx	Fix length of field or maximum length in the case of variable leng fields.

Table 3 Type Meaning

No.	Type	Meaning
1.	Fixed	No field length used
2.	LLVAR or (..xx)	Where LL < 100, means two leading digits LL specify the field length of field VAR
3.	LLLVAR or (…xxx)	Where LL < 1000, means two leading digits LLL specify the field length of field VAR

No.	Key	Type	Value
4.	MT	VarChar (4)	Message Type
5.	MC	Varchar (7)	Module Code
6.	PC	String	Processing Code
7.	CC	String	Channel Code
8.	DT	VarChar (14)	Transaction Date Time
9.	RC	VarChar (4)	Response Code
10.	MP	JSON Object	Module Parameter