Wireshark uses this table to map specific protocols to a certain DPC/SSN
combination for SCCP.
This table is a user table, as described in Section 11.7, “User Accessible Tables”, with the
following fields:
- Network Indicator
 - 
An Integer representing the network indicator for which this association is
valid.
 - Called DPCs
 - 
A range of integers representing the dpcs for which this association is valid.
 - Called SSNs
 - 
A range of integers representing the ssns for which this association is valid.
 - User protocol
 - 
The protocol that is carried over this association