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Omnitracs Knowledge Base

Forward T2 Message - Type 609

Submitting a Forward T2 Message (Type 609)

This transaction is used to request the transmission of a forward message to a T2-equipped trailer. The receipt of this transaction will cause QTRACS to place a call to OMCRTMSG. The parameter list will be constructed using values supplied in the transaction. Refer to the OMCRTMSG section of this document for additional information.

Forward T2 message transaction format

From To Size Type Field Name
1 5 9 Packed Local GMH
6 8 3 Character Transaction Type = 609
9 18 10 Character Sender
19 19 1 Character Reserved - set to blanks
20 21 3 Packed Reserved - set to zero
22 31 10 Zoned Destination
32 241 210 Character Reserved - set to blanks
242 243 3 Packed Times to Transmit
244 244 1 Character Priority
245 245 1 Character Schedule
246 246 1 Character Return Receipt
247 247 1 Character Word Wrap
248 257 10 Character Response Indicator
258 259 3 Packed T2 Data Type
260 261 3 Packed Reserved - set to zero
262 271 10 Character Application ID
272 278 7 Character Reserved - set to blanks
279 279 1 Character Body Type Indicator
280 282 5 Packed Message Body Length
283 2182 1900 Character Message Body

Forward T2 message transaction fields

Field Name Description
Local GMH This packed decimal field contains the Local GMH as assigned by the application requesting that this message be sent. Upon receipt of this transaction, QTRACS will assign a Global Message Handle. If requested, QTRACS will return that GMH to the external application defined in the Application ID field. QTRACS discards the Local GMH upon receipt.
Transaction Type This field must be set to 609.
Sender Source entity identifier. Denotes the source (sender) of the message. The source must be an application.
Destination T2 device ID. Denotes the serial number of the T2 device to which this message will be sent. Must be a single 10-digit terrestrial T2 ID in the range of 0120000001:0129999998.
Times to Transmit Times to transmit. This field is passed through to the NMC. It is only used for components of the message that are transmitted over the OmniTRACS link. A zero value in this field will cause the NMC to transmit the message based on its internal defaults. This field should be set to zero unless there are very specific transmission requirements. Setting this field to a value other than zero may adversely affect the characteristics of the transmission priority.
Priority Message transmission priority. Valid values are:
  • 0 normal priority
  • 4 immediate priority
Schedule Schedule for off-peak (batch) transmission where:
  • 0 disable
  • 1 enable
Return Receipt This field must be set to 0.
Word Wrap This field must be set to 0.
Response Indicator This field must be set to *NONE.
T2 Data Type This field indicates the type of data that is contained in the T2 message body, where:
  • 000 T2 Update Status
  • 001 T2 Parameter Query
  • 002 T2 Parameter Update
  • 003-999 Reserved for future use
Application ID If the calling application would like QTRACS to return the GMH for this message, then this field should contain the registered QTRACS external application id to which the 692 transaction will be sent. See an explanation of the 692 transaction for more details. This is only necessary in a RI (remote integration) environment.
Body Type Indicator This field must be set to 'R' (T2).
Message Length This is the length (in characters) of the message as it is stored in the T2 Message Body field. The maximum length is 1900.
T2 Message Body This field contains the body of the message. It is a variable length field. The length of the field (in characters) is indicated in the Message Length field described above.
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