ISDN Information
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| ISDN Errors (Continued) | |
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Code | Cause | Definition | |
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| No answer from user (user | The destination fails to complete the connection within the | |
19 | prescribed time after responding to the connection request. The | ||
alerted) | |||
| problem occurs at the remote end of the connection. | ||
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21 | Call rejected | The destination rejects the call for an unknown reason, although | |
capable of accepting the call. | |||
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22 | Number changed | No system has been assigned the ISDN number used to set up the | |
call. (The diagnostic field of the message may return an alternate | |||
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| address assigned to the called equipment.) | |
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26 | The destination rejected the call, although capable of accepting it, | ||
because the call was not assigned to the user. | |||
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| A signaling message can not be delivered because the interface is | |
27 | Destination out of order | not functioning correctly, and therefore the destination can not be | |
reached. This condition might be temporary, though of extended | |||
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| duration; for instance, remote equipment might be turned off. | |
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28 | Invalid number format | Destination address presented in an unrecognizable format or an | |
incomplete destination address prevented the connection from | |||
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| being established. | |
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29 | Facility rejected | The network can not provide facility requested by the user. | |
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30 | Response to STATUS | The prior receipt of a status inquiry message generated the status | |
ENQUIRY | message. | ||
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31 | Normal, unspecified | A normal has occurred with no standard cause applying. No | |
resulting action is required. | |||
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34 | No circuit/channel | The call can not be taken because no appropriate channel is | |
available | available to establish the connection. | ||
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| The network is not functioning correctly and this condition may | |
38 | Network out of order | persist for an extended period. The call can not reach the | |
destination and an immediate attempt to reconnect will probably | |||
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| fail. | |
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41 | Temporary failure | The network is not functioning correctly and an error occurred. The | |
problem will be resolved shortly. | |||
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42 | Switching equipment | The network switching equipment is temporarily overloaded and | |
congestion | the destination can not be reached. | ||
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43 | Access information | The requested access information can not be provided by the | |
discarded | network. | ||
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44 | Requested circuit/channel | An unknown reason prevents the remote equipment from providing | |
not available | the requested channel. This might be a temporary problem. | ||
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47 | Resource unavailable, | An unknown reason prevents the remote equipment from providing | |
unspecified | the requested channel. This might be a temporary problem. | ||
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49 | Quality of service | The network can not provide the requested quality of service (as | |
defined by CCITT recommendation X.213). This might be a | |||
unavailable | |||
| subscription problem. | ||
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50 | Requested facility not | The remote equipment supports the requested supplementary | |
subscribed | service, but only by subscription. | ||
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132 | ViewStation User’s Guide |