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Data Indication
Direction
- MTP 2 -> Layer 3
Description
- The DATA INDICATION notifies the layer 3 application of a Message Signal Unit (MSU) received on the specified data link.
Format
- Service User ID Application's reference number for this link (from BIND REQUEST)
- Data The contents of the received MSU; the first byte of data is typically the Service Information Octet (SIO), followed by the routing label and protocol dependent data. Layer 2 strips the flag(s), 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 The application derives the length of the data from the message start and end offsets in the message.
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