SMPP Global SMS
Receive a generic negative acknowledgment
The generic_nack PDU returns a negative acknowledgment when you submit a message containing invalid data in the message header. This occurs if a PDU with an invalid or unsupported Command ID is received.
An error is recorded in the log in both circumstances. No response is returned when a generic_nack message is received.
Generic_nack PDU parameters
Field Name |
Description |
---|---|
Command Length |
Length of the PDU in octets. Size (octets): 4 Type: Integer Value: Customer-supplied |
Command ID |
Identifies the type of message the SMPP PDU represents. Size (octets): 4 Type: Integer Value: 0x80000000 |
Command Status |
Status code returned dependent on the type of error—for example, if a PDU is received with an invalid command_id, then 0x03 should be returned. Size (octets): 4 Type: Integer Value: Variable, depending on the returned code |
Sequence Number |
The sequence number relevant to the original PDU, if the PDU is valid but not supported by OpenMarket. OpenMarket supports the following PDUs:
Size (octets): 4 Type: Integer Value: Customer-supplied |