0x1F SS7 Link Set/Link

Byte | AIB Field Description
--- | ---
2 | Address Element: 0x1F
3 | Data Length: 0x03
4 | Data[0] Stack ID (0-3)
5 | Data[1] Link Set ID Indicates the signaling link set to which this link is being assigned. 0x00-0x23 Signaling Link Sets 0-35
6 | Data[2] Link ID 0x00-0x0F - Primary SS7 Card 0x10-0x1F - Secondary SS7 Card

See Address Information Block.
The information in an AIB that follows the header, down to the data field. An AIB can have one or more Address Elements. AEs correspond to Span, Channel, and SS7 Link.
Link that connects to the same node
See Signaling System Number Seven.