Command> set debug 0x54
Command> show S17
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[omitted]
Session termination history:
0 min - Cause Unknown

Command> set console
Command> set debug termination
Command> [097:18:40:03:20] S17: Session Terminated - Cause Unknown

The following termination causes relate to ISDN, asynchronous, and synchronous connections:

Termination Cause	Description
Admin Reset	A reset S0 command was issued on that port.
Callback -User Requested	The incoming call is for a dialback user, the PortMaster terminated the connection to call back the user.
Host Request	The user requested to reset the port.
Host Request (PMD)	The user requested to reset the port using the in.pmd service.
Idle Timeout	The user was disconnected by the idle timer.
Login Timeout	The user did not respond to the login: prompt in the time specified by the login timer.
Lost Carrier	The session terminated when the local modem dropped the Data Carrier Detect (DCD) signal for some reason. For example: The remote user or modem hung up the telephone. No problem exists. The line was dropped or received interference too severe for the modem to recover from.
Lost Service-Interface Down	The logical interface is down.
Lost Service-Interface Error	An unspecified interface error occurred.
Lost Service-LMI	The PortMaster lost connectivity to the Frame Relay switch.
Lost Service-No Netbufs	The PortMaster has run out of network buffers. Contact Lucent InterNetworking Systems Technical Support.
NAS Request- Modem Config Complete	The PortMaster 3 modem initialization is complete.
NAS Request- PPP Maximum Retransmissions	The PortMaster sent a specified number of PPP packets with no response, and has determined that the remote PPP stack has disappeared.
Port Error- Exceeded LAPM retrans limit	The PortMaster exceeded the Link Access Procedure for Modems (LAPM) retransmission limit.
Port Error- Exceeded MNP retrans limit	The PortMaster either exceeded the Microcom Networking protocol (MNP) retransmission limit (12 retries) or the idle timer expired waiting for Link Request (1 second) or Link Acknowledge (5 seconds).
Port Error-PPP could not send	The PortMaster was trying to send PPP and could not for an unknown reason.
Port Error- PPP loop detected	The PortMaster is receiving its own data, possibly due to a CSU/DSU malfunction.
Port Error- Spurious Interrupts	A Clear To Send (CTS), Data Set Ready (DSR) and/or Data Carrier Detect (DCD) signal was toggling more than 10,000 times in a 1-second window, so the PortMaster reset the port.
Port Error-Wrong Type	The port is set for network connections only, and a login user attempted to connect.
Service Unavailable-Access Denied	A login user attempted to access a host, or service was denied by an access filter.
Service Unavailable-Auth Failed	The user entered an incorrect ID or password.
Service Unavailable-Device Unavailable	An outbound connection could not connect because the host did not reply.
Service Unavailable-Dial Script Failed	The dial script on an outbound connection failed.
Service Unavailable-Failed to detect V.42 Remote	The remote end of a connection does not support V.42bis compression.
Service Unavailable-Host Unavailable	An inbound connection could not connect because the host did not reply.
Service Unavailable-Master Out of Sync	A master point-to-point (PTP) list is not synchronized with slave PortMaster products in a Multichassis PPP bundle.
Service Unavailable-Out of Assigned Addresses	The assigned addresses pool has fewer addresses than available ports because of a misconfiguration of the address pool.
Service Unavailable-PPP Auth Failed	The user entered an incorrect password.
Service Unavailable-PPP CHAP Auth Failed	The user entered an incorrect CHAP password or ID.
Service Unavailable-PPP No Protocol	A protocol could not be negotiated.
Service Unavailable-PPP Outbound PAP Auth Failed	A user dialed out with Password Authentication Protocol (PAP) and received a negative acknowledgment (NAK) from the remote end.
Service Unavailable-PPP PAP Auth Failed	The user entered an incorrect PAP password or ID.
Session Timeout	The user was disconnected by the session timer.
User Error- Bad parameter in MNP lr neg	The PortMaster received a incorrect parameter in the link request negotiation.
User Error-Failed to complete V.42 neg	V.42 negotiation failed to establish MNP or LAPM for a reason other than open distributed processing (ODP), automatic data processing (ADP), exchange ID (XID), or set asynchronous balanced mode extended (SABME) timeout.
User Error-Local link rates do not match remote	The rate negotiated for the downstream connection is smaller than the minimum connection speed parameter specified by the host.
User Error-Non LR received in MNP init	The PortMaster received a zero-length link rate.
User Error-LAPM negotiation timeout	The timer has expired while trying to detect an XID or SABME command. The timeout value is 30 seconds for K56Flex connections, and 5 seconds otherwise.
User Error-PPP NCP active to reply	The PortMaster received a reply during an active PPP session.
User Error- PPP NCP active to request	The PortMaster received a request for a connection during an active PPP session.
User Error-PPP LCP Protocol Reject	The connection was refused at the Link Control Protocol (LCP) layer.
User Request-Admin Quit	The user typed exit at the command prompt.
User Request- PPP TERM ACK	The PortMaster sent a session termination request (TERM_REQ), and the remote end replied with a termination acknowledgment (TERM_ACK).
User Request- PPP TERM REQ	The remote end sent a TERM_REQ.
User Request-Normal	A normal disconnection occurred.
User Request-Modem Disconnect	On a PortMaster with external modems, DCD was dropped.
User Request- Normal LAPM Disconnect	The LAPM on the remote modem requested a disconnect.
User Request-Call Circuit Closed	The telephone company dropped the digital signal level 0 (DS0) circuit that user was on for one of the following reasons: Remote modem in an on-hook condition Three invalid login attempts Sudden line termination Remote modem turned off