X.25 Network-Generated Diagnostic Codes

The following table lists the diagnostic codes that the X.25 network may generate within clear service signals, reset service signals, and diagnostic packets. Codes may not necessarily apply to the network to which you are connected.

General diagnostic codes appear when uncommon or unanticipated problems occur. Contact your Network Administrator if you receive a code for a general diagnostic.

Specific diagnostic codes provide more detailed information to enable you or the Network Administrator to diagnose problems.

General diagnostic	Decimal code	Hexadecimal code	Specific diagnostic
No additional information	0	00	Contact your Network Administrator
	1	01	Invalid P(S) packet send sequence number
	2	02	Invalid P(R) packet receive sequence number
Packet type invalid	16	10	Contact your Network Administrator
	17	11	For state r1 (packet level ready)
	18	12	For state r2 (DTE restart requested)
	19	13	For state r3 (DCE restart request)
	20	14	For state p1 (call setup ready)
	21	15	For state p2 (DTE waiting)
	22	16	For state p3 (DCE waiting)
	23	17	For state p4 (data transfer)
	24	18	For state p5 (call collision)
	25	19	For state p6 (DTE clear request)
	26	1A	For state p7(DCE clear indication)
	27	1B	For state d1 (flow control ready)
	28	1C	For state d2 (DTE reset request)
	29	1D	For state d3 (DCE reset indication)
Packet not allowed	32	20	Contact your Network Administrator
	33	21	Unidentifiable packet
	34	22	Call on one-way logical channel
	35	23	Invalid packet type on a permanent virtual circuit
	36	24	Packet on unassigned logical channel
	37	25	Reject not subscribed to
	38	26	Packet too short
	39	27	Packet too long
	40	28	Invalid general format identifier (GFI)
	41	29	Restart packet with nonzero in bits 1 to 8 of byte 2
	42	2A	Packet type not compatible with facility
	43	2B	Unauthorized interrupt confirmation
	44	2C	Unauthorized interrupt
	45	2D	Unauthorized reject
Time expired	48	30	Contact your Network Administrator
	49	31	For incoming call
	50	32	For clear indication
	51	33	For reset indication
	52	34	For restart indication
Call setup or clearing problem	64	40	Contact your Network Administrator
	65	41	Facility code not allowed
	66	42	Facility parameter not allowed
	67	43	Invalid called address
	68	44	Invalid calling address
	69	45	Invalid facility length
	70	46	Incoming call barred
	71	47	No logical channel available
	72	48	Call collision
	73	49	Duplicate facility requested
	74	4A	Nonzero address length
	75	4B	Nonzero facility length
	76	4C	Facility not provided when expected
	77	4D	Invalid CCITT-specified DTE facility
Miscellaneous	80	50	Contact your Network Administrator
	81	51	Improper cause code from DTE
	82	52	Not aligned byte
	83	53	Inconsistent Q bit setting
International problem	112	70	Contact your Network Administrator
	113	71	Remote network problem
	114	72	International protocol problem
	115	73	International link out of order
	116	74	International link busy
	117	75	Transit network facility problem
	118	76	Remote network facility problem
	119	77	International routing
	120	78	Temporary routing problem
	121	79	Unknown called DNIC
	122	7A	Maintenance action¹

Decimal code	Hexa- decimal code	Protocol	Meaning	Explanation and action
135	87	TPP	Port is busy	Call again.
		SNA	Invalid logical link control	Invalid address: protocol violation. Contact your Network Administrator.
		IP	No SVCs available	No virtual channels are available for the call. Contact your Network Administrator.
136	88	DSP	Device not configured	Contact your Network Administrator.
		SNA	LU not found. Condition could be temporary.	Call host computer operator for LU activation.
		TPP	No PCS	Contact your Network Administrator.
137	89	TPP	Frame is too large	Contact your Network Administrator.
		SNA	LU reconnection error	Call host computer operator for LU activation.
138	8A	DSP	Device powered off or out-of-order	Contact your Network Administrator.
		IP	Rejected: Reverse charging not accepted	Contact your Network Administrator.
		SNA	LU not ready	Call host computer operator for LU activation. This condition could be temporary.
		TPP	Reverse charging not allowed (revacc=no in tppconf file)	Contact your Network Administrator.
139	8B	TPP	CUG or CUG type do not match
		SNA	Reconnection LU not ready. Condition could be temporary.	Call host computer operator for LU activation.
		IP	Rejected: CUG mismatch
140	8C	SNA	Invalid LNR received	Link level failure. Contact your Network Administrator.
141	8D	SNA	Device off-line	Not seen; sent to device when powered off.
		DSP	Device powered off	The device is out of service. Contact your Network Administrator.
142	8E	DSP	Invitation to clear or circuit disconnect	The host PAD has sent an invitation-to-clear message to the Passport unit. The unit has cleared the call.
		SNA	IPL complete	The attached unit has completed the IPL sequence.
191	BF	DSP	Device in use	The requested device is already in use for another connection. Repeat your call later, or try another destination, if available.
230	E6	[Any]	Software incompatible with personality module	Contact your Network Administrator.
231	E7	ITI	ITI not in idle state	The destination's ITI module is temporarily busy. Try the call again later.
232	E8	ITI	Password or authorization failure	Enter the correct password. Contact your Network Administrator if the problem persists.
233	E9	ITI	Invalid port name	Your call was cleared because it specified the number of nonexistent port. Check the number and try the call again. Contact your Network Administrator if the problem persists.
234	EA	ITI	Reset caused by using BREAK key	Proceed as you normally would.
235	EB	ITI	Reset command executed by user	Proceed as you normally would.
236	EC	ITI	Device attached to PVC port is on-line	The PVC is operational again. No action needed.
237	ED	ITI	Device attached to PVC port is off-line	Contact your Network Administrator.
238	EE	ITI	Class of service could not be determined	Contact your Network Administrator.
		DSP	Control Unit out-of-service	The Network Administrator entered a dsp.down command to disable the control unit.
239	EF	ITI	Call cleared due to data loss	If this is part of normal operation, try the call again. If not, contact your Network Administrator.
240	F0	ITI	Destination port is not in service	Your call was cleared because the destination port has been disabled to prevent it from accepting incoming calls.
241	F1	ITI	Destination device not ready	The destination device is not meeting the requirements to establish a connection with the remote PAD. Contact your Network Administrator.
242	F2	ITI	Restricted response to fast select	The destination port has sent a clear request in response to your fast select call with restricted response.
243	F3	ITI	ITI timer expired or user aborted	The ITI activity timer expired or you did something to abort the call. Try the call again.
244	F4	ITI	Modem control lines dropped	The remote end of the connection dropped its modem control lines. Contact your Network Administrator.
245	F5	ITI	Received invitation to clear	The destination has requested that the call be cleared. This is the normal response when you sign off an application. If it appears elsewhere, contact your Network Administrator.
246	F6	ITI	ITI clear command	No action needed.
247	F7	ITI	Invalid or unavailable class of service	Enter the name of a valid, available class of service. Contact your Network Administrator if the problem persists.
248	F8	ITI	PVC origination error	The originating end of the PVC is incorrectly configured. Contact your Network Administrator.
249	F9	ITI, SNA	PVC routing error	The PVC cannot be routed to the destination under the current configuration. Contact your Network Administrator.
252	FC	[Any]	Cannot find route to destination	The destination is inaccessible to you under the current configuration. Contact your Network Administrator.
253	FD	[Any]	Address not found in netmap file	The destination address does not exist within the current configuration. Check the address and try the call again; contact your Network Administrator if the problem persists.
254	FE	[Any]	Loop in routing	Your call was looped back to you instead of arriving at the destination. This is typically caused by a routing failure. Contact your Network Administrator.