OSI Troubleshooting Guide, May 1997

Chapter 1 51
Interoperability Testing
Reason and Refuse Codes
Session Refuse Codes
Table 1-8 describes the meanings defined by ISO 8327 for the reason
codes carried on a negative Session connect confirmation. These values
are logged after S_CONNECT_Resp (Negative) message, and on return
from the ses_connect_rf() library call.
Table 1-8 Session Refuse Codes
Code Meaning
0 Reason not specified.
1 Rejection by called Session service user due to
temporary congestion.
2 Rejection by called Session service user. The
following octets may be used for up to 512 octets of
user data.
81 SSAP identifier unknown.
82 Session service user not attached to SSAP.
83 SBM congestion at connect time.
84 Proposed protocol versions not supported.