Network messages
Presence Indicators include
mandatory, conditional, optional, echo
Messages must adhere to defined data types and indicators. Request messages are sent from the acquirer, and the response from the issuer. Messages types include 0800, 0810.
Presence Indicators
These serve as a guide to denote whether a data element should be present in the message.
- Mandatory: The element is required in the message.
- Conditional: The element is mandatory under certain conditions
- Optional: The element is not always required in the message.
- Echo: In response messages, this code indicates that the response message sender must include the same value it received in the data element in the associated request message. In other words, the responder must echo back the data element if it is present in the request message.
(Repeat) (0800)
| Bit Data | Element Name | Presence Indicator |
|---|---|---|
| 7 | Transmission date and time | Mandatory |
| 11 | Systems trace audit number | Mandatory |
| 32 | Acquiring Institution Code (to be shared with you) | Mandatory |
| 70 | Network Management Information Code | Mandatory |
(0810)
| Bit Data | Element Name | Presence Indicator |
|---|---|---|
| 7 | Transmission date and time | Mandatory |
| 11 | Systems trace audit number | Mandatory |
| 32 | Acquiring Institution Code | Mandatory |
| 39 | Response Code | Mandatory |
| 70 | Network Management Information Code | Mandatory |