OSI Troubleshooting Guide, May 1997

Chapter 1 45
Interoperability Testing
Reason and Refuse Codes
(0x01) Provider N-Disconnect (Transient)
Previously active network connection was
abruptly disconnected. Congestion at TSAP
Some vendor’s equipment may indicate that
the application above transport is not
capable of receiving any more connections.
The X.25 card or the switch
may have gone down.
Check the remote for any
further logged information.
(0x02) Provider N-Disconnect (Permanent)
Previously active network connection was
abruptly disconnected. Transport User Not
Attached to TSAP Indicates that the address
specified is valid, but that no process capable
of receiving connections is active.
The X.25 card or the switch
may have gone down.
Verify that server is active on
remote.
(0x03) Provider N_Reject (Transient) Network
connection could not be established.
Address Unknown
Address specified was incorrect.
Check the NSAP and T-
selector.
(0x04) Provider N_Reject (Permanent) Request to
establish a network connection was rejected.
Check for facility rejection,
non-use of fast select, reverse
charge failure, switch or PDN
out of order.
(0x05) Provider N_Reject (QOS unavail/ Transient)
QOS negotiation failed for this connection.
(0x06) Provider N_Reject (QOS unavail/
Permanent)
QOS negotiation failed for this connection.
(0x07) N-Reject (NSAP unreachable/ Transient)
Network connection could not be established
because there were not enough VCs or
resources available.
Use x25stat to examine the
state of the network card.
Check log file for OTS
messages.
Code Meaning Action