Error Log Entries and Test to Clear Values

Error Log Entries and Test to Clear Values

Table 35. ISDN-PRI Signaling Group Error Log Entries �
Error Type	Aux Data	Associated Test	Alarm Level	On/Off Board	Test to Clear Value
0*	0	Any	Any		test sig-group grp#
1 (a)	Any	None
257 (b)	Any	None			test sig-group grp#
513 (c)	Any	None			test sig-group grp#
769	Any	Primary Signaling Link Hardware Check (#636)			test sig-group grp#
1025	Any	Secondary Signaling Link Hardware Check (#639)			test sig-group grp#
1793 (d)	Any	Layer 2 Status (Test #647)	WARNING	OFF	test sig-group grp#
2049 (e)	Any	Layer 2 Status (Test #647)	WARNING	OFF	test sig-group grp#
2305 (f)	Any	Remote Layer 3 Query (Test #637)	MINOR	OFF	test sig-group grp#
3585 (g)	Port number	None
3842 to 3942(h)	Port number	None
*Run the Short Test Sequence first. If all tests pass, run the Long Test Sequence. Refer to the appropriate test description and follow the recommended procedures.

Notes:

(a) This switch sent a message to the far-end switch or terminal adapter, and the far-end did not respond in the allotted time. Possible causes include link failure and congestion or outage at the far-end. The Aux Data field contains Layer 3 protocol information used by internal counters.

If no other symptoms are present, no action is required. If Layer 3 communication is down, there should be indications in the form of alarms and errors for link components. Check out other errors against ISDN-SGR, ISDN-TRK, and other hardware components on the link.

There is no test to clear these errors. The error counter is decremented by 1 every 15 minutes.

(b) This error indicates that the primary signaling channel connection has been lost for more than 90 seconds. If a secondary signaling channel does not exist or is not in-service, the associated B-channels will be placed in the ISDN Maintenance/Far-End state. The B-channels will not be usable for outgoing calls, although incoming calls will still be accepted. The switch will automatically attempt to recover the signaling link. Pay particular attention to the results of Test #636 (Primary Signaling Link Hardware Check) in the test sequence. When the link does recover, the B-channels will be negotiated back to the In-Service state and their alarms will be retired.

When this error occurs, the state of the Signaling Group is changed to out-of-service (verify using the status sig-group command).

(c) This error indicates that the secondary signaling channel connection has been lost for more than 90 seconds. If the primary signaling channel is not in-service, B-channels will be placed in the ISDN Maintenance/Far-End state. The B-channels will not be usable for outgoing calls, although incoming calls will still be accepted. The switch will automatically attempt to recover the signaling link. Pay particular attention to the results of Test #639 (Secondary Signaling Link Hardware Check) in the test sequence. When the link does recover, the B-channels will be negotiated back to the In-Service state and their alarms will be retired.

When this error occurs, the state of the Signaling Group is changed to out-of-service (verify using the status sig-group command).

(d) This error indicates a failure of the Layer 2 Query Test for the primary signaling channel
(e) This error indicates a failure of the Layer 2 Query Test for the secondary signaling channel.
(f) This error indicates a failure of Test #637, the Remote Layer 3 Query. A specific message was sent to the far-end switch, and it did not respond within the allotted time. Investigate elements of the ISDN PRI D-channel(s) (ISDN-LNK) for both this switch and the Far-end switch. If Test #637 fails twice in a row, the B-channels will be alarmed and made unavailable for outgoing calls (although incoming calls will still be accepted). When Test #637 succeeds and the Far-end switch starts responding properly, the DS1 ISDN Trunk (B-channels) will be placed back into normal operation and their alarms will be retired.
(g) A SERV or SERV ACK ISDN D-channel message has been received by a non-US-type interface (country option other than 1 on the DS1 administration form). However, these messages are used only for duplex NFAS signaling which is supported only by country protocol 1.

Thus, there may be a mismatch in administration between the local and far-end switches. Consult with the customer's network provider to determine whether the D-channel is set up correctly on the far-end switch.

(h) These Error Types are used to report certain error messages received by the ISDN-PRI Signaling Group for one of its associated B-channels. The aux data field shows for which B-channel (port number) the message was received.

The error code generated equals 3840+x, where x is a Cause Value defined by the ISDN PRI Specification. Note that there is no Test to Clear Value for these Error Types; selected ISDN cause values are placed in the log when they are received, but no direct action or alarming is performed solely in response to receiving them. They provide added data that may prove useful when tracking down obscure networking and routing problems. The following table provides more information:

Table 36. Descriptions and Recommendations for Error Types 3842-3942 �
Error Code	Description	Recommendation
3842	A request has been made to use a transit network or common carrier that cannot be accessed.	From the Media Module and port number (in the Aux Data field), determine the trunk group against which the error was reported. Check all routing patterns containing this trunk group for validity of interexchange carriers requested (IXC field).
3843	No route to destination. Request received to route call through a transit network that is recognized but not allowed to carry the call or not able to serve the destination.
3846	The far-end switch has indicated that the B-channel (trunk) is not acceptable for use in the call for which it was requested.	This could indicate an administration problem (for example, the local switch and the far-end switch have different B-channels administered), or could reflect the occurrence of a normal race condition (for example, the local switch has requested use of a B-channel which the far-end switch had just reserved for use on another call). From the Media Module and port number (in the Aux Data field), determine the trunk group against which the error was reported. Issue the status trunk command for the indicated trunk. Refer to the "DS1 ISDN Trunk Service States" and "ISDN-PRI Trunk Service States" sections of ISDN-TRK for recovery suggestions.
3858	Similar to Error Type 1. The switch sent an ISDN message to the far-end switch or terminal adapter which did not respond in the allotted time.	Follow same recommendations as for Error Type 1.
3878	The far-end switch has indicated that the network is not functioning correctly and that the condition may last a relatively long period of time (for example, immediately re-attempting the call may not be successful).	From the Media Module and port number (in the Aux Data field, determine the trunk group against which the error was reported. Consult with the network provider to determine the nature and expected duration of the out of service condition. Consider modifying all routing patterns containing this trunk group, to route calls around the network which is out of service.
3890	A request to use a network service (e.g., SDN) has been denied. Administration somewhere on the network has indicated that the requested service has not been subscribed to or purchased for this trunk.	This could be a local administration problem only, or a mismatch between the local administration and that of the network provider. From the Media Module and port number (in the Aux Data field), determine the trunk group against which the error was reported. Display the trunk group form: If the trunk group is Call-by-Call (Service Type is "cbc"), check all routing pattern forms containing this trunk group to see if the Service/Feature fields contain the correct network services purchased for this trunk. If the trunk group is not Call-by-Call, check that the Service Type field contains the single network service purchased for this trunk. If local administration appears correct, consult with the customer and/or the network provider to determine the services that the customer has subscribed to for this trunk group.
3892	Protocol detail; may offer a clue if customer is having ISDN calls denied with an unexpected intercept tone.	If customer is complaining of unexpected intercept tones when accessing ISDN trunks or PRI endpoints and no other cause can be found, escalate the problem and provide the next tier with this Error Log information.
3894	Protocol detail; may offer a clue if customer is having ISDN calls denied with an unexpected intercept tone.	First, eliminate any transitory state mismatch problems by issuing the test port GGGVSpp command for the trunk port shown in the aux data field. Test #256 (Service State Audit) is the important test in the sequence. If this passes satisfactorily, yet the customer continues to complain of unexpected intercept tones when accessing ISDN trunks or PRI endpoints and no other cause can be found, escalate the problem and provide the next tier with this Error Log information.
3902	FRANCE ONLY: Service not authorized.
3903	Service or option not available, unspecified. This cause is used to report a service or option not available event only when no other cause in the service or option not available class applies.
3905	Protocol detail; may offer a clue if customer is having ISDN calls denied with an unexpected intercept tone.	If customer is complaining of unexpected intercept tones when accessing ISDN trunks or PRI endpoints and no other cause can be found, escalate the problem and provide the next tier with this Error Log information.
3906	Protocol detail; may offer a clue if customer is having ISDN calls denied with an unexpected intercept tone.	If customer is complaining of unexpected intercept tones when accessing ISDN trunks or PRI endpoints and no other cause can be found, escalate to the problem and provide the next tier with this Error Log information.
3909	A request to use a network service has been made, but the network has rejected the request because the requested service is not implemented.	Follow the recommendations listed above for Error Type 3890.
3910	Only restricted digital BC available.
3919	Service or option not implemented, unspecified. Used when no other cause in this class applies.
3928	A call was denied because of a basic incompatibility between the type of call and either the facilities selected by the routing pattern or the called user itself.	This error might be helpful as a clue if the customer complains of receiving unexpected intercept tone after accessing ISDN trunks or PRI endpoints. Determine the trunk group from the Media Module and port number (in the aux data field) and then check the BCC fields of the pertinent routing patterns. Also, investigate whether or not the calling and called endpoints are compatible (for example, some ISDN switches may not allow a voice station to call a data extension).
3942	Timer expiry: T310 time-out, no answer to CALL PROCEEDING.