0x73 IP Signaling Series 3 Card ID

Byte | AIB Field Description
--- | ---
2 | Address Element: 0x73
3 | Data Length: 0x02
4 | Data[0, 1] IP Signaling Series 3 Card ID

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.
Internet Protocol. Part of the TCP/IP family of protocols used to route messages and tracks the addresses of nodes.