Directing exception: a node is unable to perform the required directing
or redirecting function for a request as a result of insufficient
directory support, or incompatibility between TP name and presence/absence
of a user name.
Bytes 2 and 3 following the sense code contain sense code specific
information.
- 0000
- No specific code applies.
- 0001
- Agent name known but not supported for specified user destination.
- 0002
- Agent name known but not supported for specified node destination.
- 0003
- Agent name is known at this DSU but is not available.