Advanced Diagnostics - ISDN Diagnostic codes

• These errors are not defined by the ETSI (EuroISDN) specification, but may occur in other ISDN implementations.  

00 - Normal Disconnect

The call has been disconnected in the normal way; for example by hanging up a phone or terminating a data connection.

01 - Unassigned (Unallocated number)
The number you dialled is incorrect.

Check the number and any prefixes you need to access the network if you are connected to a PBX. For more information on which part of the ISDN network is reporting the error, refer to the location code.
02 - No route to specified transit network
Your ISDN service provider’s equipment cannot route the call through the specified network, either because this network does not exist or because it is not compatible with your ISDN service provider’s equipment.

Check the number and any prefixes you need to access the network if you are connected to a PBX.
Check that the type of call you are making (data, voice, fax) can be routed between the ISDN networks serving both you and the destination.  
Check that the Bearer Capabilities of the call are acceptable to the ISDN networks serving both you and the destination.  

For more information on which part of the ISDN network is reporting the error, refer to the location code. 

03 - No route to destination
Your ISDN service provider cannot route the call to the specified destination.

Check the number and any prefixes you need to access the network if you are connected to a PBX.
Check that the type of call you are making (data, voice, fax) can be routed between the ISDN networks serving both you and the destination.  
Check that the Bearer Capabilities of the call are acceptable to the ISDN networks serving both you and the destination.
For more information on which part of the ISDN network is reporting the error, refer to the location code.
04 - Send special information tone
The remote number you dialed could not be reached.

Check the number and any prefixes you need to access the network if you are connected to a PBX.
Contact your ISDN service provider.
Contact the person responsible for the service (for example, your Internet service provider).
05 - Misdialled trunk prefix
The remote number you dialed could not be reached.

Check the number and any prefixes you need to access the network if you are connected to a PBX.
If you are using a PBX check the configuration of the PBX.
Contact your ISDN service provider.
Contact the person responsible for the service (for example, your Internet service provider).

06 - Channel unacceptable
The call attempt failed because the channel cannot be used.

If you are using a PBX check the configuration of the PBX.
Contact your ISDN service provider.
If you are using a Primary Rate ISDN connection (24 or 30 B-channels) check with your ISDN service provider exactly how many channels are provisioned.

07 - Call awarded and being delivered in an established channel
An incoming call is being established. 

If you are using a PBX check the configuration of the PBX.
Contact your ISDN service provider if this condition persists.
08 - Preemption
Your call attempt was blocked. This can happen, for example, if another call has a higher priority than your call.
Wait and try the call again later.
If you are using a PBX (or the remote site that you are connecting to uses a PBX) check the configuration of the PBX.
If the condition persists, contact your ISDN service provider.
09 - Preemption, circuit reserved for re-use
Your call attempt was blocked. This can happen, for example, if another call has a higher priority than your call.
Wait and try the call again later.
If you are using a PBX (or the remote site that you are connecting to uses a PBX) check the configuration of the PBX.
If the condition persists, contact your ISDN service provider.
10 - Normal call clearing
The remote device terminated the connection. 
This might or might not indicate an error.
For example, if you requested a callback, then the remote device will disconnect and then call you back; this indicates normal behavior.
The remote device may have disconnected you because your session has been inactive for a some pre-determined time.
If the remote device terminated the connection unexpectedly, contact the person responsible for the service (for example, your Internet service provider) to determine if there is a problem with the remote device. If the device is malfunctioning, ask if you can dial into an alternative device to use the service.
11 - User busy
The device you called is busy.

Check the number you are calling.
Wait and try again later.
If the condition persists, contact your ISDN service provider.
12 - No remote response
The remote device you called did not respond.

This usually indicates a problem with the remote device or application.
Check the number you are calling.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.
If the condition persists, contact the person responsible for the service (for example, your Internet service provider).
13 - No answer
The remote device did not answer your call. 

The remote device or application is probably working properly, it just did not answer your call.
Check the number you are calling.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.
If the condition persists, contact the person responsible for the service (for example, your Internet service provider).
14 - Subscriber absent
The mobile remote device you called is not available (the device has disconnected from the ISDN network).

Contact the person responsible for the service or device.
15 - Call rejected
The remote device rejected your call.

If you configured D-channel callback, this does not indicate an error; the remote device will call you back.
If you did not configure callback, then there might be a problem concerning the service you need to use.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.
If the condition persists, contact the person responsible for the service (for example, your Internet service provider).
16 - Number changed
The ISDN number you dialed is no longer assigned to the remote party you want to call.

Check the number you are calling.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.
Contact the person responsible for the service (for example, your Internet service provider) to obtain the new ISDN number.

17 - Redirection to new destination
Your call is being routed to a different ISDN number.

Check the number you are calling.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.
Contact your ISDN service provider to determine if you should reconfigure the remote ISDN number.
19 - Exchange routing error
Your call cannot be successfully routed to the remote party.

Check the number you are calling.
If you are using a PBX (or the remote site that you are connecting to uses a PBX) check the configuration of the PBX.
Contact your ISDN service provider.
1A - Non-selected user clearing
An incoming call was rejected.

The ISDN network should not return this cause code.
If you are using a PBX (or the remote site that you are connecting to uses a PBX) check the configuration of the PBX.
Contact your ISDN service provider if this condition persists.
1B - Destination out of order
The ISDN network is unable to connect to the remote device.

Check the number you called.
If the remote site that you are connecting to uses a PBX, check the configuration of the PBX.

1C - Invalid number format
The number you called is incorrect.

Check the number you called.
If you are using a PBX (or the remote site that you are connecting to uses a PBX) check the configuration of the PBX.

1D - Facility rejected
Your call was not completed because the ISDN network does not support a service you have tried to use.

If you are using a PBX, check that it supports the type of call that you are making. You may need to check the Bearer Capabilities of the call.

1E - Response to STATUS ENQUIRY
The ISDN network forwarded a STATUS ENQUIRY message.

If this condition persists, contact your ISDN service provider.
1F - Normal unspecified
This message indicates that a normal event occurred. 

For example, if you requested a callback, then the remote device will disconnect and then call you back; this indicates a normal event.
If the remote device terminated the connection unexpectedly, contact the person responsible for the device or service.
22 - No circuit/channel available
The call cannot be completed because there are no available channels.

If another application is using your B-channels, close it to free your B-channels.
If you are not using any other applications, the remote device might be busy. In this case, you should wait and try the call again later.
For more information on which part of the ISDN network is reporting the error, refer to the location code.
26 - Network out of orderYour call could not be completed because there are problems with the ISDN network. 

If you are using a PBX, check it.
If the problem persists, contact your ISDN service provider.
27 - Permanent frame mode connection out of serviceThe permanent connection was terminated, probably due to equipment failure.

If the problem persists, contact your ISDN service provider.
28 - Permanent frame mode connection operationalThe permanent connection is fully operational again. (The connection was terminated previously, probably due to equipment failure.)

29 - Temporary failure
Your call could not be completed because there is a problem with the ISDN network. The problem is temporary.

Try again later
If the problem persists, contact your ISDN service provider.

2A - Switching equipment congestion
Your call could not be completed because the ISDN network is busy.

Try again later
If the problem persists, contact your ISDN service provider.

2B - Access information discarded
The ISDN network is not able to deliver all the information contained in your call to the remote device.

2C - Requested circuit/channel not available
Your call could not be completed because there is no channel available for the remote device.

For more information on which part of the ISDN network is reporting the error, refer to the location code.
2E - Precedence call blocked
The remote device you called is busy.

Try again later.
If the problem persists, contact the person responsible for the device or service you are calling.

2F - Resource unavailable, unspecified
The ISDN network is not currently available.

Try again later.
If the problem persists, contact your ISDN service provider.
31 - Quality of service unavailable
Your call was not completed because the ISDN network does not support a service you need to use.

Check the number and any prefixes you need to access the network if you are connected to a PBX.
Check that the type of call you are making (data, voice, fax) can be routed between the ISDN networks serving both you and the destination.
Check that the Bearer Capabilities of the call are acceptable to the ISDN networks serving both you and the destination.
For more information on which part of the ISDN network is reporting the error, refer to the location code.
32 - Requested facility not subscribed
You requested a service that you are not authorized to use (you have not subscribed to this service).

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider to subscribe to the required facility.

35 - Outgoing calls barred within CUG
You attempted to call the remote device, but the ISDN network does not allow you to make outgoing calls.

Contact your ISDN service provider

37 - Incoming calls barred within CUG
The ISDN network does not allow you to receive calls.

Contact your ISDN service provider

39 - Bearer capability not authorized
You requested a service that you are not authorized to use (you have not subscribed to this service).

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider to subscribe to the required facility.

3A - Bearer capability not presently available
You requested a service that is not currently available.

Try again later
If the problem persists: Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider to subscribe to the required facility.

3F - Service or option not available, unspecified
Try again later
If the problem persists: Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider to subscribe to the required facility.

41 - Bearer capability not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider.

42 - Channel type not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider.

45 - Requested facility not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider.

46 - Only restricted information bearer capability available
Your call was not completed because the ISDN network does not support a service you need to use.

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider.

4F - Service or option not available, unspecified
Your call was not completed because the ISDN network does not support a service you need to use.

Check that the type of call you are making (data, voice, fax) is supported by the ISDN network.
If you are using a PBX, check that the type of call you are making (data, voice, fax) is supported by the PBX on your port. Check that the Bearer Capabilities of the call are acceptable to the ISDN network.
If you are using a PBX, check that the Bearer Capabilities of the call are acceptable to the PBX.
You may need to analyse a trace to determine the facility you need to subscribe to.
Contact your ISDN service provider.

51 - Invalid call reference value
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

52 - Identified channel does not exist
The connection is attempting to use a channel that is not assigned to you.

If the problem persists, contact your ISDN service provider.

53 - A suspended call exists, but this identity does not
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

54 - Call identity in use
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

55 - No call suspended
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

56 - Call having the requested call identity has been cleared
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

57 - User not member of CUG
Your call was not completed, probably due to one of the following reasons:

• The ISDN number you dialed is incorrect.

• You requested a service that you are not authorized to use (you have not subscribed to this service).

• The remote device is not authorized to use a service that you are using.

Check the number you called.
If the problem persists, contact your ISDN service provider.

58 - Incompatible destination
The ISDN network ignored or rejected a call request because it is incompatible with the configuration of the remote device or service.
For example, you have tried to make a data call to a phone or fax machine or you have tried to make an analog call to a data-only device.

Check the number you called.
Check the capabilities of the remote device or service
Check the type of call that you are making

5A - Non-existent CUG
Your call was not completed, probably due to one of the following reasons:

• The ISDN number you dialed is incorrect.

• You requested a service that you are not authorized to use (you have not subscribed to this service).

• The remote device is not authorized to use a service that you are using.

Check the number you called.
If the problem persists, contact your ISDN service provider.

5B - Invalid transit network selection
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error).

If the problem persists, contact your ISDN service provider.

5F - Invalid message, unspecified
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error)

• There is an error in the configuration of your DIVA software; for example, you might have selected the wrong switch type or specified incorrect SPIDs (NI-1 and 5ESS switch types)

Check that you have configured the correct switch type in your DIVA software
If the problem persists, contact your ISDN service provider.

60 - Mandatory Information Element is missing
Your call was not completed because it did not contain all the information required by the ISDN network.

You may be able to determine the missing information by analyzing a trace.
Contact your ISDN service provider.

61 - Message type non-existent or not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

• You may be able to obtain more information by analyzing the DiTrace file.

• Contact your ISDN service provider.

62 - Message not compatible with call state, or not implemented
Your call was not completed, probably because an error occurred (for example, a state synchronization error).

You should wait and try the call again later.
If the problem persists, contact your ISDN service provider.

63 - Information Element non-existent or not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

• You may be able to obtain more information by analyzing the DiTrace file.

• Contact your ISDN service provider.

64 - Invalid Information Element contents
Your call was not completed because the ISDN network does not support a service you need to use.

• You may be able to obtain more information by analyzing the DiTrace file.

• Contact your ISDN service provider.

65 - Message not compatible with call state
Your call was not completed, probably because an error occurred (for example, a state synchronization error).

You should wait and try the call again later.
If the problem persists, contact your ISDN service provider.

66 - Recovery on time expiry
Your call was not completed, probably because an error occurred (for example, a state synchronization error).

You should wait and try the call again later.
If the problem persists, contact your ISDN service provider.

67 - Parameter not implemented
Your call was not completed because the ISDN network does not support a service you need to use.

• You may be able to obtain more information by analyzing the DiTrace file.

• Contact your ISDN service provider.

6E - Message with unrecognized parameter
Your call was not completed because the ISDN network does not support a service you need to use.

• You may be able to obtain more information by analyzing the DiTrace file.

• Contact your ISDN service provider.

6F - Protocol Error, unspecified
Your call was not completed, probably due to one of the following reasons:

• The ISDN network does not support a service you need to use.

• An error occurred (for example, a state synchronization error)

• There is an error in the configuration of your DIVA software; for example, you might have selected the wrong switch type or specified incorrect SPIDs (NI-1 and 5ESS switch types)

Check that you have configured the correct switch type in your DIVA software
If the problem persists, contact your ISDN service provider.

7F - Interworking, unspecified
Your call was disconnected. The ISDN network did not specify the reason for the disconnection.

If the problem persists, contact your ISDN service provider.