MTP 3 -> MTP 2
Asks MTP 2 to transmit an MSU (message signal unit) on the specified data link.
The following table lists the message parameters:
Type |
Field |
Description |
U8 |
Message Type |
0x14 |
S16 |
Service Provider ID |
MTP 2 reference number for the link on the TX board. Valid values are 0 through 15. |
Variable |
Data |
The contents of the MSU to transmit. The first byte of data is typically the SIO (service information octet), followed by the routing label, and protocol dependent data. Layer 2 inserts the flags, sequence number, length indicator, and frame check sequence. The maximum length of the data field is 274 octets including the SIO. There is no field to specify the length of the data field. MTP 2 derives the length of the data from the message start and end offsets in the message. |