311 lines
5.3 KiB
Groff
311 lines
5.3 KiB
Groff
.\" Process this file with
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.\" groff -man -Tascii isdn_cause.7 for ASCII output, or
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.\" groff -man -Tps isdn_cause.7 for PostScript output
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.\"
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.TH isdn_cause 7 "December 1998" "ISDN 4 Linux @I4LVERSION@" Miscellaneous
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.SH NAME
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isdn_cause \- Description of ISDN cause messages.
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.SH DESCRIPTION
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This document describes the cause messages, used with the
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.SM ISDN
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D-channel protocols EDSS1 and 1TR6 and their format, visible to
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the user.
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.SH FORMAT
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Cause messages are 2-byte information elements, describing
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the state transitions of an
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.SM ISDN
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line. Each cause message describes its origination (location) in one byte,
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while the cause code is described in the other byte. Internally, when
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EDSS1 is used, the first byte contains the location while the second
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byte contains the cause code. When using 1TR6, the first byte contains
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the cause code while the location is coded in the second byte. In the
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Linux
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.SM ISDN
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subsystem, the cause messages visible to the user are unified to avoid
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confusion. All user visible cause messages are displayed as hexadecimal
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strings. These strings always have the location coded in the first byte,
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regardless if using 1TR6 or EDSS1. When using EDSS1, these strings are
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preceded by the character 'E'.
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.SH CAUSE MESSAGES WITH EDSS1
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.SS LOCATION
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The following location codes are defined when using EDSS1:
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.TP
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.B 00
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Message generated by user.
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.TP
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.B 01
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Message generated by private network serving the local user.
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.TP
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.B 02
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Message generated by public network serving the local user.
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.TP
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.B 03
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Message generated by transit network.
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.TP
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.B 04
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Message generated by public network serving the remote user.
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.TP
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.B 05
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Message generated by private network serving the remote user.
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.TP
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.B 07
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Message generated by international network.
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.TP
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.B 0A
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Message generated by network beyond inter-working point.
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.SS CAUSE
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The following cause codes are defined when using EDSS1:
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.TP
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.B 01
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Unallocated (unassigned) number.
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.TP
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.B 02
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No route to specified transit network.
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.TP
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.B 03
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No route to destination.
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.TP
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.B 06
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Channel unacceptable.
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.TP
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.B 07
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Call awarded and being delivered in an established channel.
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.TP
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.B 10
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Normal call clearing.
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.TP
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.B 11
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User busy.
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.TP
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.B 12
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No user responding.
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.TP
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.B 13
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No answer from user (user alerted).
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.TP
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.B 15
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Call rejected.
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.TP
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.B 16
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Number changed.
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.TP
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.B 1A
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Non-selected user clearing.
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.TP
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.B 1B
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Destination out of order.
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.TP
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.B 1C
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Invalid number format.
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.TP
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.B 1D
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Facility rejected.
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.TP
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.B 1E
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Response to status enquiry.
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.TP
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.B 1F
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Normal, unspecified.
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.TP
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.B 22
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No circuit or channel available.
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.TP
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.B 26
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Network out of order.
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.TP
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.B 29
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Temporary failure.
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.TP
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.B 2A
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Switching equipment congestion.
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.TP
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.B 2B
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Access information discarded.
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.TP
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.B 2C
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Requested circuit or channel not available.
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.TP
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.B 2F
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Resources unavailable, unspecified.
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.TP
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.B 31
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Quality of service unavailable.
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.TP
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.B 32
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Requested facility not subscribed.
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.TP
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.B 39
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Bearer capability not authorised.
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.TP
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.B 3A
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Bearer capability not presently available.
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.TP
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.B 3F
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Service or option not available, unspecified.
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.TP
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.B 41
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Bearer capability not implemented.
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.TP
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.B 42
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Channel type not implemented.
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.TP
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.B 45
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Requested facility not implemented.
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.TP
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.B 46
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Only restricted digital information bearer.
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.TP
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.B 4F
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Service or option not implemented, unspecified.
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.TP
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.B 51
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Invalid call reference value.
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.TP
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.B 52
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Identified channel does not exist.
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.TP
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.B 53
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A suspended call exists, but this call identity does not.
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.TP
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.B 54
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Call identity in use.
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.TP
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.B 55
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No call suspended.
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.TP
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.B 56
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Call having the requested call identity.
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.TP
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.B 58
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Incompatible destination.
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.TP
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.B 5B
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Invalid transit network selection.
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.TP
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.B 5F
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Invalid message, unspecified.
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.TP
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.B 60
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Mandatory information element is missing.
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.TP
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.B 61
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Message type non-existent or not implemented.
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.TP
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.B 62
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Message not compatible with call state or message or message type non
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existent or not implemented.
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.TP
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.B 63
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Information element non-existent or not implemented.
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.TP
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.B 64
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Invalid information element content.
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.TP
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.B 65
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Message not compatible.
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.TP
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.B 66
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Recovery on timer expiry.
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.TP
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.B 6F
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Protocol error, unspecified.
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.TP
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.B 7F
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Inter working, unspecified.
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.SH CAUSE MESSAGES WITH 1TR6
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.SS LOCATION
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The following location codes are defined when using 1TR6:
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.TP
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.B 00
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Octet not available. (Not always generated.)
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.TP
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.B 44
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Message generated by public network.
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.TP
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.B 45
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Message generated by private network.
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.TP
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.B 4F
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Unknown.
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.SS CAUSE
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The following cause codes are defined when using 1TR6:
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.TP
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.B 00
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Normal call clearing.
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.TP
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.B 01
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Invalid Call reference value.
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.TP
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.B 03
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Bearer service not implemented.
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.TP
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.B 07
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Call identity does not exist.
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.TP
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.B 08
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No channel available.
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.TP
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.B 10
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Requested facility not implemented.
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.TP
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.B 11
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Requested facility not subscribed.
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.TP
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.B 20
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Outgoing calls barred.
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.TP
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.B 21
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User access busy.
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.TP
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.B 22
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Closed user group mismatch.
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.TP
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.B 23
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Non existent closed user group.
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.TP
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.B 25
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SPV connection not allowed.
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.TP
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.B 35
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Destination not obtainable.
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.TP
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.B 38
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Number changed.
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.TP
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.B 3A
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No user responding.
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.TP
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.B 3B
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User busy.
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.TP
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.B 3D
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Incoming calls barred.
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.TP
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.B 3E
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Call rejected.
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.TP
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.B 59
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Network congestion.
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.TP
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.B 5A
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Remote user initiated.
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.TP
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.B 70
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Local procedure error.
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.TP
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.B 71
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Remote procedure error.
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.TP
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.B 72
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Remote user suspended.
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.TP
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.B 73
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Remote user resumed.
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.TP
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.B 7F
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User info discarded locally.
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.SH SEE ALSO
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.BR "ITU Q.850" ", " "FTZ Richtlinien 1TR3, Band 3 (1TR6)"
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