Список ошибок протокола Q.931

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В таблице ниже приведен список кодов ошибок протокола Q.931 и описание кодов

Decimal codeHex codeDescriptionNotes
101Unallocated (unassigned) numberThe ISDN number was sent to the switch in the correct format; however, the number is not assigned to any destination equipment.
202No route to specified transit networkThe ISDN exchange is asked to route the call through an unrecognized intermediate network.
303No route to destinationThe call was routed through an intermediate network that does not serve the destination address.
606Channel unacceptableThe service quality of the specified channel is insufficient to accept the connection.
707Call awarded and being delivered in an established channelThe user is assigned an incoming call that is being connected to an already-established call channel.
1610Normal call clearingNormal call clearing has occurred.
1711User busyThe called system acknowledges the connection request but is unable to accept the call because all B channels are in use.
1812No user respondingThe connection cannot be completed because the destination does not respond to the call.
1913No answer from user (user alerted)The destination responds to the connection request but fails to complete the connection within the prescribed time. The problem is at the remote end of the connection.
2115Call rejectedThe destination is capable of accepting the call but rejected the call for an unknown reason.
2216Number changedThe ISDN number used to set up the call is not assigned to any system.
261ANon-selected user clearingThe destination is capable of accepting the call but rejected the call because it was not assigned to the user.
271BDesignation out of orderThe destination cannot be reached because the interface is not functioning correctly, and a signaling message cannot be delivered. This might be a temporary condition, but it could last for an extended period of time. For example, the remote equipment might be turned off.
281CInvalid number formatThe connection could be established because the destination address was presented in an unrecognizable format or because the destination address was incomplete.
291DFacility rejectedThe facility requested by the user cannot be provided by the network.
301EResponse to STATUS ENQUIRYThe status message was generated in direct response to the prior receipt of a status enquiry message.
311FNormal, unspecifiedReports the occurrence of a normal event when no standard cause applies. No action required.
3422No circuit/channel availableThe connection cannot be established because no appropriate channel is available to take the call.
3826Network out of orderThe destination cannot be reached because the network is not functioning correctly, and the condition might last for an extended period of time. An immediate reconnect attempt will probably be unsuccessful.
4129Temporary failureAn error occurred because the network is not functioning correctly. The problem will be resolved shortly.
422ASwitching equipment congestionThe destination cannot be reached because the network switching equipment is temporarily overloaded.
432BAccess information discardedThe network cannot provide the requested access information.
442CRequested circuit/channel not availableThe remote equipment cannot provide the requested channel for an unknown reason. This might be a temporary problem.
472FResources unavailable, unspecifiedThe requested channel or service is unavailable for an unknown reason. This might be a temporary problem.
4931Quality of service unavailableThe requested quality of service cannot be provided by the network. This might be a subscription problem.
5032Requested facility not subscribedThe remote equipment supports the requested supplementary service by subscription only.
5739Bearer capability not authorizedThe user requested a bearer capability that the network provides, but the user is not authorized to use it. This might be a subscription problem.
583ABearer capability not presently availableThe network normally provides the requested bearer capability, but it is unavailable at the present time. This might be due to a temporary network problem or to a subscription problem.
633FService or option not available, unspecifiedThe network or remote equipment was unable to provide the requested service option for an unspecified reason. This might be a subscription problem.
6541Bearer capability not implementedThe network cannot provide the bearer capability requested by the user.
6642Channel type not implementedThe network or the destination equipment does not support the requested channel type.
6945Requested facility not implementedThe remote equipment does not support the requested supplementary service.
7046Only restricted digital information bearer capability is availableThe network is unable to provide unrestricted digital information bearer capability.
794FService or option not implemented, unspecifiedThe network or remote equipment is unable to provide the requested service option for an unspecified reason. This might be a subscription problem.
8151Invalid call reference valueThe remote equipment received a call with a call reference that is not currently in use on the user-network interface.
8252Identified channel does not existThe receiving equipment is requested to use a channel that is not activated on the interface for calls.
8353A suspended call exists, but this call identity does notThe network received a call resume request. The call resume request contained a Call Identify information element that indicates that the call identity is being used for a suspended call.
8454Call identity in useThe network received a call resume request. The call resume request contained a Call Identify information element that indicates that it is in use for a suspended call.
8555No call suspendedThe network received a call resume request when there was not a suspended call pending. This might be a transient error that will be resolved by successive call retries.
8656Call having the requested call identity has been clearedThe network received a call resume request. The call resume request contained a Call Identity information element, which once indicated a suspended call. However, the suspended call was cleared either by timeout or by the remote user.
8858Incompatible destinationIndicates that an attempt was made to connect to non-ISDN equipment. For example, to an analog line.
915BInvalid transit network selectionThe ISDN exchange was asked to route the call through an unrecognized intermediate network.
955FInvalid message, unspecifiedAn invalid message was received, and no standard cause applies. This is usually due to a D-channel error. If this error occurs systematically, report it to your ISDN service provider.
9660Mandatory information element is missingThe receiving equipment received a message that did not include one of the mandatory information elements. This is usually due to a D-channel error. If this error occurs systematically, report it to your ISDN service provider.
9761Message type non-existent or not implementedThe receiving equipment received an unrecognized message, either because the message type was invalid or because the message type was valid but not supported. The cause is due to either a problem with the remote configuration or a problem with the local D channel.
9862Message not compatible with call state or message type non-existent or not implementedThe remote equipment received an invalid message, and no standard cause applies. This cause is due to a D-channel error. If this error occurs systematically, report it to your ISDN service provider.
9963Information element non-existent or not implementedThe remote equipment received a message that includes information elements, which were not recognized. This is usually due to a D-channel error. If this error occurs systematically, report it to your ISDN service provider.
10064Invalid information element contentsThe remote equipment received a message that includes invalid information in the information element. This is usually due to a D-channel error.
10165Message not compatible with call stateThe remote equipment received an unexpected message that does not correspond to the current state of the connection. This is usually due to a D-channel error.
10266Recovery on timer expiresAn error-handling (recovery) procedure was initiated by a timer expiry. This is usually a temporary problem.
1116FProtocol error, unspecifiedAn unspecified D-channel error when no other standard cause applies.
1277FInternetworking, unspecifiedAn event occurred, but the network does not provide causes for the action that it takes. The precise problem is unknown.