4 : Release procedures
~~~~~~~~~~~~~~~~~~~~~~~
* 4.1 : Arrow diagram
This section contains the arrow diagrams for the Q.931/Q.764 interworking
release procedures.
* 4.1.1 : End-to-end ISDN scenario
The following normal call release procedures are indicated.
Case 1: This case shows the normal call release interworking procedure
without tone provision (Figure 20/Q.699).
A DISConnect message from the originating user is mapped via the
Disconnect Indication and Release Request primitives into a
RELease message in the network.
At the destination end, a RELease message from the network is
mapped into a DISConnect message sent to the terminating user via
Release Indication and Disconnect Request primitives.
The tone/announcement option is not applied in the terminating
exchange.
Case 2: This case shows the normal call release interworking procedure
with tone provision (Figure 21/Q.699).
The tone/announcement option is applied in the terminating
exchange.
A RELease message from the network is mapped into a DISConnect
message with progress indicator (## 8, in-band information or
appropriate pattern is now available) sent to the terminating
user.
4.1.2 PSTN/ISDN interworking scenario
~~~~~
The following normal release procedures in PSTN to ISDN interworking
scenario are indicated.
Case 1: Clear forward (Figure 22/Q.699, Case 1)
This case shows the normal call release procedure being initiated
from the originating PSTN by means of a clear forward signal.
At the ISDN/PSTN interworking exchange, the clear forward signal
is mapped into a RELease message to the ISDN exchange.
Case 2: Clear backward (Figure 22/Q.699, Case 2)
This case shows the normal call release procedure being initiated
from the terminating ISDN user by means of a DISConnect message.
At the ISDN-PSTN interworking exchange, a RELease message is
mapped into an appropriate backward signal in PSTN.
4.1.3 ISDN/PSTN interworking scenario
~~~~~
The following normal release procedures in the ISDN to PSTN interworking
scenario are indicated.
Case 1: Clear forward (Figure 23/Q.699, Case 1)
This case shows the normal call release procedure being initiated
from the originating ISDN user by means of a DISConnect message.
At the ISDN/PSTN interworking exchange, a RELease message is
mapped into an appropriate clear forward signal in PSTN.
Case 2: Clear backward (Figure 23/Q.699, Case 2)
This case shows the normal call release procedure being initiated
from the terminating PSTN by means of a clear backward signal.
At the ISDN/PSTN interworking exchange, the clear backward signal is mapped
into a SUSpend message with suspend/resume indicator (network initiated).
The terminating ISDN exchange starts the time. Upon expiry of the timer,
if the terminating exchange has not received a RESume message, the terminating
exchange initiates clearing by sending a DISConnect message to the user, and
sending a RELease message to the preceding exchange.
4.1.4 Notes for Figures 20/Q.699-23/Q.699
~~~~~
Note 1 - This procedure is applicable to those basic services where in-band
tone/announcement is not provided, e.g. 64 kbit/s unrestricted
bearer service.
Note 2 - The DISC message should not include the progress indicator ##8.
Note 3 - This procedure is applicable to both speech and 3.1 kHz audio bearer
services.
Note 4 - The provision of tone is optional. If tone is provided, progress
indicator ##8 should be included in the DISC message. If tone is not
provided, progress indicator ##8 should not be included.
Figure 20/Q.699, p.
Figure 21/Q.699, p.
Figure 22/Q.699, p.
Figure 23/Q.699, p.
* 4.2 : Mapping of parameters
This section contains the mapping table of Q.763/Q.931 messages and
associated parameters.
H.T. [T18.699]
TABLE 16/Q.699
Mapping of release procedure parameters for ISDN call
__________________________________________________
User/Network Network User/Network
__________________________________________________
Message DISConnect RELease DISConnect
__________________________________________________
Contents *Cause *Cause *Cause
__________________________________________________
Table 16/Q.699 [T18.699], p.
H.T. [T19.699]
TABLE 17/Q.699
Mapping of release procedure parameters for PSTN-ISDN call
(Called party clears)
___________________________________________________________
PSTN Network User/Network
___________________________________________________________
Message Clear Backward Signal RELease DISConnected
___________________________________________________________
Contents *Cause *Cause
___________________________________________________________
Table 17/Q.699 [T19.699], p.
H.T. [T20.699]
TABLE 18/Q.699
Mapping of release procedure parameters for PSTN-ISDN call
(Called party clears)
____________________________________________________________________________
PSTN Network User/Network
____________________________________________________________________________
Message Clear forward signal RELease DISConnect
____________________________________________________________________________
Contents {
*Cause
##16, Normal call clearing
} {
*Cause
##16, Normal call clearing
}
____________________________________________________________________________
Table 18/Q.699 [T20.699], p.
H.T. [T21.699]
TABLE 19/Q.699
Mapping of release procedure parameters for ISDN-PSTN call
(Calling party clears)
__________________________________________________________
User/Network Network PSTN
__________________________________________________________
Message DISConnect RELease Clear forward signal
__________________________________________________________
Contents *Cause *Cause
__________________________________________________________
|
Table 19/Q.699 [T21.699], p.
5 : Interworking specification for unsuccessful set-up procedure
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* 5.1 : Arrow diagram
This section contains the arrow diagrams for the unsuccessful call set-up
procedures.
5.1.1 Unsuccessful call set-up, point-to-point data link
~~~~~
Figure 24/Q.699 shows the unsuccessful call set-up procedure, where inband
tones/announcements are not provided (e.g. 64 kbit/s unrestricted bearer
service). The RELease COMPlete message at the destination exchange is mapped
into the RELease message via the Reject Indication and Release Request
primitives. At the originating exchange the RELease message is mapped via the
Release Indication and Disconnect Request primitives into the DISConnect
message.
5.1.2 Unsuccessful call - Broadcast data link
~~~~~
Figure 25/Q.699 shows the unsuccessful call set-up procedure, where inband
tones/announcements are not provided (e.g. 64 kbit/s unrestricted bearer
service), in the case where the called party is addressed via a broadcast data
link. The returning of the RELease COMPlete message via a broadcast data link
is optional. In the case shown, on receipt of the RELease COMPlete message at
the destination exchange the cause value is retained, and to allow for the
possibility of another terminal accepting the call, the Reject Indication
primitive is not generated until the expiry of timer T303.
Note - Where the network does not receive any response to the initial SETUP
message before the expiry of timer T303, the SETUP message is
retransmitted and T303 is restarted. If no further response is
received by the network on the second expiry of timer T303, the Reject
Indication primitive is generated.
The RELease message is then mapped from the Reject Ind and Release
Request primitives. At the originating exchange the RELease message is
mapped via the Release Indication and Disconnect Request primitives
into the DISConnect message.
5.1.3 Unsuccessful call - Tone/announcement applied at the originating
~~~~~ exchange
Figure 26/Q.699 shows the unsuccessful set-up procedure where tones or
announcements are generated in the originating exchange towards the ISDN user
as a result of receiving a RELease message.
Timer T306 is started after the appropriate tone/announcement is sent.
Figure 26/Q.699 shows the originating ISDN user releasing before timer T306
expires.
5.1.4 Unsuccessful call - Tone applied by terminating exchange
~~~~~
Figure 27/Q.699 shows an unsuccessful call where certain tones and
announcements can only be generated in the terminating exchange (or transit
exchange) during call establishment. This is a typical case, for example, for
a changed number announcement where the changed number information is only
available at the terminating local exchange. Alternatively, a specific
announcement may be applied at a transit exchange to indicate, for example,
that all circuits to a particular destination are busy.
The originating exchange sends a DISconnect message to the calling user
with progress indicator ## | , thus indicating that in-band information is
available. Normal release procedures apply after the in-band information has
been connected.
5.1.5 Unsuccessful call - Originating exchange tone/announcement time-out
~~~~~ expires
Figure 28/Q.699 shows the case of tone time-out expiry at the local
exchange. This is very similar to S 5.1.3 above except that the caller fails
to clear the call following the application of the tone. Timer T306 then
expires.
5.1.6 ISDN-PSTN interworking - Tone/announcements applied by terminating
~~~~~ exchange within PSTN
Figure 29/Q.699 shows an unsuccessful call where the sending of tones and
announcements is generated by the terminating exchange during the call set-up
phase. In this case, an Address Complete Message is returned from the
interworking point with indicators set as shown in Note 8 (see S 5.1.8). This
is mapped to a PROGress Message at the originating local exchange, with the
progress indicator set to value 1, to indicate that in-band information may be
available. The sequence applies to failure occurring at any point within the
PSTN.
5.1.7 Premature release - Point-to-point data link
~~~~~
Figure 30/Q.699 shows a premature release situation where release is
received at the terminating local exchange prior to any terminal response. In
this situation a DISConnect message is sent to the called user and the normal
clearing procedure is initiated.
5.1.8 Notes for Figures 24/Q.699-30/Q.699
~~~~~
Note 1 - This procedure is applicable in those cases where in-band
tone/announcements are not provided, e.g. 64 kbit/s unrestricted
bearer service.
Note 2 - This message is delivered by a point-to-point data link.
Note 3 - This message is sent by a broadcast data link.
Note 4 - Timer T306 is started in the Q.931 protocol block.
Note 5 - If tones/announcements are applied, a DISConnect message may be sent
containing progress indicator ##8. As an alternative, a PROGress
message may also be sent containing progress indicator ##8.
Note 6 - Customized announcements can only be provided by this exchange.
Note 7 - Tone/announcement time-out expires.
Note 8 - Backward call indicators in the Address Complete Message set as
follows:
o ISDN access indicator = non-ISDN
o Protocol control indicators = interworking encountered
o Called party's status indicator = no indication.
Note 9 - See S 2.1.9.1 of Recommendation Q.764 for through-connect timing.
Note 10 - If the clearing ISDN user is the called party, this message becomes
a clear back.
Note 11 - In the case of point-to-multipoint, the DISConnect message is not
sent. Terminals are released as they respond.
Figure 24/Q.699, p.
Figure 25/Q.699, p.
Figure 26/Q.699, p.
Figure 27/Q.699, p.
Figure 28/Q.699, p.
Figure 29/Q.699, p.
Figure 30/Q.699, p.
* 5.2 : Mapping of parameters
This section contains the mapping of Q.763/Q.931 messages and associated
parameters.
H.T. [T22.699]
TABLE 20/Q.699
Mapping of ISDN user part address complete message parameters
_________________________________________________________________________________________________
Originating user/network Netk
_________________________________________________________________________________________________
Message DISCONNECT (Q.931) {
ADDRESS COMPLETE MESSAGE (ISUP)
}
_________________________________________________________________________________________________
Cause Caus Contents Progress indicator {
Inband information indicator (Network tone or announcement
applied)
}
_________________________________________________________________________________________________
Note - In this case the inclusion of a Progress Indicator is man-
datory.
Table 20/Q.699 [T22.699], p.
H.T. [T23.699]
TABLE 21/Q.699
Mapping of ISUP Call Progress parameters
_____________________________________________________________________________
Originating user/network Network
_____________________________________________________________________________
Message (Q.931) PROGRESS {
ADDRESS COMPLETE MESSAGE (ISUP)
}
_____________________________________________________________________________
Cause Cause
Contents Progress indicator {
Inband information indicator
(Network Tone/Announcement applied)
}
_____________________________________________________________________________
Note - In this case the inclusion of a Progress Indicator is man-
datory.
Table 21/Q.699 [T23.699], p.
H.T. [T24.699]
TABLE 22/Q.699
Mapping of Q.931 RELease COMPlete message information elements
_________________________________________________________________________________
Originating user/network Network Terminating user/network
_________________________________________________________________________________
Message (Q.931) DISC (ISUP) RELEASE (Q.931) REL COMP
_________________________________________________________________________________
Contents Cause Cause
Cause
_________________________________________________________________________________
Note - The Progress Indicator is included when Tones/Announcements are
provided at the originating local exchange when the Bearer Capability =
speech or 3.1 kHz Audio (see Fig. 5.3).
Table 22/Q.699 [T24.699], p.
H.T. [T25.699]
TABLE 23/Q.699
Alternative mapping of Q.931 RELease COMPlete message
information elements
_________________________________________________________________________________
Originating user/network Network Terminating user/network
_________________________________________________________________________________
Message (Q.931) PROGRESS (ISUP) RELEASE (Q.931) REL COMP
_________________________________________________________________________________
Contents Cause Cause Cause
_________________________________________________________________________________
|
|
|
|
|
|
|
|
|
|
Table 23/Q.699 [T25.699], p.
6 : Interworking specifications for suspend/resume procedures
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* 6.1 : Arrow diagrams
This section contains the arrow diagrams for the Recommendation Q.931/Q.764
interworking suspend/resume procedures.
6.1.1 Successful and unsuccessful suspend/resume procedures
~~~~~
Figure 31/Q.699 indicates the successful and unsuccessful suspend and
resume procedures.
Suspension control and supervision point is the originating local exchange
and maybe a controlling exchange in the network.
The ISDN User Part protocol in the network is used to convey the
notification to the remote end from the originating exchange.
6.1.2 Suspend/resume - Control and supervision within NT2
~~~~~
Figure 32/Q.699 illustrates the suspend and resume interworking procedures,
where the control and supervision point is located within the NT2.
6.1.3 Suspend/resume - ISDN/PSTN interworking
~~~~~
Figure 33/Q.699 illustrates the suspend and resume procedures for ISDN-PSTN
interworking.
6.1.4 Suspend/resume - PSTN/ISDN interworking
~~~~~
Figure 34/Q.699 illustrates the suspend and resume procedures for PSTN-ISDN
interworking.
6.1.5 Notes for Figures 31/Q.699-34/Q.699
~~~~~
Note 1 - Supervision control in controlling exchange.
Note 2 - Supervision may be performed by the interworking exchange. In that
case the clear-back and reanswer messages would not be sent.
Note 3 - When a DISConnect message is sent by the terminating subscriber, the
release procedures in accordance with S 4 apply.
Figure 31/Q.699, p.
Figure 32/Q.699, p.
Figure 33/Q.699, p.
Figure 34/Q.699, p.
* 6.2 : Mapping of parameters
This section contains the mapping of Q.763/Q.931 messages and associated
parameters.
H.T. [T26.699]
TABLE 24/Q.699
Mapping of SUSPEND/RESUME parameters
_________________________________________________________________________________________
User/Network Network Network/User
_________________________________________________________________________________________
{
Message/information element parameter
} SUSPEND {
SUSPEND
Suspend/Resume indicator
(Note)
} {
NOTIFY
Notification indicator (set to user suspended)
}
_________________________________________________________________________________________
RESUME {
RESUME
Suspend/Resume indicator
(Note)
}
_________________________________________________________________________________________
NOTIFY Notification indicator (set to user resumed)
Note - The values of the SUSPEND/RESUME indicator in Q.763 are
respectively "ISDN subscriber initiated" and "network initiated".
This SUSPEND/RESUME message is only mapped into the Q.931 NOTIFY
message when the SUSPEND/RESUME indicator is set to "ISDN sub-
scriber initiated".
Table 24/Q.699 [T26.699], p.
H.T. [T27.699]
TABLE 25/Q.699
Mapping of SUSPEND/RESUME parameters for interworking with NT2
___________________________________________________________________________
User/NT2 NT2/Network Network Network/NT2 NT2/User
___________________________________________________________________________
SUSPEND {
NOTIFY
Notification indicator
(user suspended)
(Note 2)
} {
SUSPEND
SUSPEND/Resume indicator
(Note 1)
} {
NOTIFY
Notification indicator
(set to user suspended)
} {
NOTIFY
Notification indicator
(set to user suspended)
}
___________________________________________________________________________
RESUME {
NOTIFY
Notification indicator
(user resumed)
(Note 2)
} {
RESUME
Suspend/Resume indicator
(Note 1)
} {
NOTIFY
Notification indicator
(set to user resumed)
} {
NOTIFY
Notification indicator
(set to user resumed)
}
___________________________________________________________________________
Note 1 - The values of the SUSPEND/RESUME Indicator in Q.763 are
respectively "ISDN subscriber initiated" and "network initiated".
This SUSPEND/RESUME message is only mapped into the Q.931 NOTIFY
message when the SUSPEND/RESUME Indicator is set to "ISDN sub-
scriber initiated".
Note 2 - Only when the NOTIFY message indicates a SUSPEND/RESUME
is this message mapped into the ISUP messages SUSPEND and RESUME.
Table 25/Q.699 [T27.699], p.
ANNEX A
_______________________
To Recommendation Q.699
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
Source of busy tone generation
* A.1 : Introduction
A.1.1 This annex provides a set of rules by which the location of the busy
~~~~~ signal tone generation point could be determined for signalling
interworking cases.
A.1.2 It is important to recognize that for those cases where a busy tone is
~~~~~ generated at a location other than the originating exchange, an
end-to-end path between the busy tone source and the user must exist.
* A.2 : Terminology
A.2.1 The terms originating exchange and terminating exchange refer to the
~~~~~ public network exchange that is closest to the respec- tive end user.
Note 1 - When an exchange of a public network has no appropriate
pre-arrangement with the calling or the called user, it assumes that
the exchange is closest to the end user, and therefore serves as an
originating or a terminating exchange in this terminology.
Note 2 - Some networks may, as a network option, permit NT2s to generate busy
tone (e.g. according to Annex C/Q.931 or Annex O/Q.931). In these
cases, the following rules shall also be applied, using the
terminology "NT2" to replace "originating exchange" or "terminating
exchange" as appropriate.
A.2.2 There are three types of signalling to be considered in these
~~~~~ discussions viz.:
i) ISDN signalling systems, i.e. Signalling System No. 7 ISDN User
Part (SS7 ISUP) and ISDN user-network interface;
ii) Type 1 PSTN signalling systems which can convey a clearing message
(e.g. a subscriber busy signal) for an unsuccessful call, e.g. SS7
TUP, SS6, R2; and
iii) Type 2 PSTN signalling systems which cannot convey a clearing message
(e.g. the subscriber busy signal) for an unsuccessful call, e.g.
R1, and in this signalling system, busy tone is used to indicate that
the called user interface is busy.
* A.3 : Rules
This section presents the set of rules for speech and 3.1 kHz audio bearer
services.
A.3.1 Rule No. 1
~~~~~
For ISDN to ISDN connections, the in-band busy tones shall normally be
generated at the originating exchange. The terminating exchange shall
originate a clearing message to the originating exchange upon notification or
identification that the user interface is busy.
A.3.2 Rule No. 2
~~~~~
For non-ISDN to ISDN connections, the in-band busy tone shall normally be
generated at the interworking exchange. The terminating exchange shall
originate a clearing message towards the originating exchange. The first
exchange that cannot originate, or convey, the clearing message (or subscriber
busy signal) towards the originating exchange shall be defined as the
interworking exchange and shall generate the busy tone. This interworking
exchange serves as an interworking exchange either between ISDN signalling
system and Type 2 PSTN signalling system or between Type 1 PSTN signalling
system and Type 2 PSTN signalling system. A network containing both the
terminating and the interworking exchange shall have the option of providing
the busy tone from anywhere inside its network.
A.3.3 Rule No. 3
~~~~~
For ISDN to non-ISDN connections, the in-band busy tone shall be generated
at either the originating exchange or in the non-ISDN network. The source of
busy will depend on the connection confiFguration and shall be determined
uniquely by the following:
o For ISDN to non-ISDN connections:
a) in which ISDN signalling exists from the originating exchange to the
terminating exchange, or
b) in which ISDN signalling and Type 1 signalling exists from the
originating to the terminating exchange, then the in-band busy tone
shall be generated at the originating exchange.
o For all other ISDN to non-ISDN connections, the in-band busy signal shall
be generated in the non-ISDN network.
Note - In cases where special call handling, upon user busy, is offered, the
exchange(s) other than specified by the above three rules can have the
option of providing the busy tone and causing the appropriate message
to be sent to the originator, and retain the connection for subsequent
user requests.
ANNEX B
(to Recommendation Q.699)
Usage of "Cause" in Recommendations Q.931, Q.763 and Q.730
* B.1 : Format
Format of Q.931 Cause information element or Q.763/Q.730 Cause indicators
parameters contents | is shown in Figure B-1/Q.699.
Figure B-1/Q.699 [T28.699], p. (traiter comme tableau MEP)
* B.2 : Codes used in the sub-field of the "Cause"
B.2.1 Extension indicator (ext)
~~~~~
Bit
8
0 octet continues through the next octet (e.g. octet 1 to 1a)
1 last octet .bp
B.2.2 Coding standard
~~~~~
Bits
7 6
0 0 CCITT standardized coding, as described below
0 1 reserved for other international standards (Note)
1 0 national standard (Note)
1 1 standard specific to identified location (Note)
Note - These other coding standards should be used only when the desired cause
can not be represented with the CCITT-standardized coding.
B.2.3 Location
~~~~~
Bits
4 3 2 1
0 0 0 0 user
0 0 0 1 private network serving the local user
0 0 1 0 public network serving the local user
0 0 1 1 transit network
0 1 0 0 public network serving the remote user
0 1 0 1 private network serving the remote user
0 1 1 1 international network
1 0 1 0 network beyond interworking point
All other values are reserved.
Note 1 - Depending on the location of the users, the local public network and
remote public network may be the same network.
Note 2 - Examples of location values to be used for various busy/congestion
conditions appear in Annex J to Recommendation Q.931. B.2.4
Recommendation
Bits
7 6 5 4 3 2 1
0 0 0 0 0 0 0 Q.931/Q.763 (Note 2)
0 0 0 0 0 1 1 X.21
0 0 0 0 1 0 0 X.25
0 0 0 0 1 0 1 public land mobile networks, Q.1031/Q.1051 (Q.763)
All other values are reserved.
Note 1 - If octet including this field is omitted, Recommendation Q.931/Q.763
is assumed.
Note 2 - This value is used only when the preceding octet is extended and the
cause in octet 4 is from Table B-1/Q.699.
B.2.5 Cause value
~~~~~
The cause value is divided into two fields, a class (bits 5 through 7) and
a value within the class (bits 1 through 4).
1. The class indicates the general nature of the event.
Class (000) : normal event
Class (001) : normal event
Class (010) : resource unavailable
Class (011) : service or option not available
Class (100) : service or option not implemented
Class (101) : invalid message (e.g. parameter out of range)
Class (110) : protocol error (e.g. unknown message)
Class (111) : interworking
2. The cause values are listed in Table B-1/Q.699.
-v'1P' -v'6p'
H.T. [1T29.699]
TABLE B-1/Q.699
Cause values
______________________________________________________________________________________________________________________________________________________
Cause value
Class Value Caunumber Cause Recommendations
______________________________________________________________________________________________________________________________________________________
7 6 5 4 3 2 1
0 0 0 0 0 0 1 1 {
Unallocated (unassigned) number (Note 1)
} Q.931, Q.763
0 0 0 0 0 1 0 2 {
No route to specified transit network
} Q.931, Q.763
0 0 0 0 0 1 1 3 No route to destination Q.931, Q.763
0 0 0 0 1 0 0 4 Send special information tone Q.931, Q.763
0 0 0 0 1 0 1 5 Misdialled trunk prefix Q.931, Q.763
0 0 0 0 1 1 0 6 Channel unacceptable Q.931
0 0 0 0 1 1 1 7 {
Call awarded and being delivered in an established channel
} Q.931
______________________________________________________________________________________________________________________________________________________
0 0 1 0 0 0 0 6 Normal call clearing Q.931, Q.763
0 0 1 0 0 0 1 7 User busy Q.931, Q.763
0 0 1 0 0 1 0 8 No user responding Q.931, Q.763
0 0 1 0 0 1 1 9 {
No answer from user (user alerted)
} Q.931, Q.763
0 0 1 0 1 0 1 1 Call rejected Q.931, Q.763
0 0 1 0 1 1 0 2 Number changed Q.931, Q.763
0 0 1 1 0 1 0 6 Non-selected user clearing Q.931
0 0 1 1 0 1 1 7 Destination out of order Q.931, Q.763
0 0 1 1 1 0 0 8 Invalid number format Q.931, Q.763
0 0 1 1 1 0 1 9 Facility rejected Q.931, Q.730
0 0 1 1 1 1 0 0 Response to STATUS ENQUIRY Q.931
0 0 1 1 1 1 1 1 Normal, unspecified Q.931, Q.763
______________________________________________________________________________________________________________________________________________________
0 1 0 0 0 1 0 4 No circuit/channel available Q.931, Q.763
0 1 0 0 1 1 0 8 Network out of order Q.931, Q.763
0 1 0 1 0 0 1 1 Temporary failure Q.931, Q.763
0 1 0 1 0 1 0 2 {
Switching equipment congestion
} Q.931, Q.763
0 1 0 1 0 1 1 3 Access information discarded Q.931
0 1 0 1 1 0 0 4 {
Requested circuit/channel not available
} Q.931, Q.763
0 1 0 1 1 1 1 7 {
Resources unavailable, unspecified
} Q.931, Q.763
______________________________________________________________________________________________________________________________________________________
0 1 1 0 0 0 1 9 {
Quality of service unavailable
} Q.931
0 1 1 0 0 1 0 0 {
Requested facility not subscribed
} Q.931, Q.730
0 1 1 0 1 0 1 3 {
Outgoing calls barred within CUG
} Q.931, Q.730
0 1 1 0 1 1 1 5 {
Incoming calls barred within CUG
} Q.931, Q.730
0 1 1 1 0 0 1 7 {
Bearer capability not authorized
} Q.931, Q.763
0 1 1 1 0 1 0 8 {
Bearer capability not presently available
} Q.931, Q.763
0 1 1 1 1 1 0 2 {
Inconsistency in designated outgoing access information and subscriber
class
} Q.931, Q.730
0 1 1 1 1 1 1 3 {
Service or option not available, unspecified
} Q.931, Q.763
______________________________________________________________________________________________________________________________________________________
Table B-1/Q.699 [1T29.699], p.
H.T. [2T29.699]
TABLE B-1/Q.699 (cont.)
___________________________________________________________________________________________________________________________________________________
Cause value
Class Value Cause ber Cause Recommendations
___________________________________________________________________________________________________________________________________________________
7 6 5 4 3 2 1
1 0 0 0 0 0 1 6 {
Bearer capability not implemented
} Q.931, Q.763
1 0 0 0 0 1 0 6 Channel type not implemented Q.931
1 0 0 0 1 0 1 6 {
Requested facility not implemented
} Q.931, Q.730
1 0 0 0 1 1 0 7 {
Only restricted digital information bearer capability is available
} Q.931, Q.763
1 0 0 1 1 1 1 7 {
Service or option not implemented, unspecified
} Q.931, Q.763
1 0 1 0 0 0 1 8 Invalid call reference value Q.931
1 0 1 0 0 1 0 8 {
Identified channel does not exist
} Q.931
1 0 1 0 0 1 1 8 {
A suspended call exists, but this call identity does not
} Q.931
1 0 1 0 1 0 0 8 Call identity in use Q.931
1 0 1 0 1 0 1 8 No call suspended Q.931
1 0 1 0 1 1 0 8 {
Call having the requested call identity has been cleared
} Q.931
___________________________________________________________________________________________________________________________________________________
1 0 1 0 1 1 1 8 Called user not member of CUG Q.931, Q.730
1 0 1 1 0 0 0 8 Incompatible destination Q.931, Q.763
1 0 1 1 0 1 0 9 Non-existent CUG Q.931, Q.730
1 0 1 1 0 1 1 9 {
Invalid transit network selection (Note 1)
} Q.931, Q.763
1 0 1 1 1 1 1 9 Invalid message, unspecified Q.931, Q.763
___________________________________________________________________________________________________________________________________________________
1 1 0 0 0 0 0 9 {
Mandatory information element is missing
} Q.931
1 1 0 0 0 0 1 9 {
Message type non-existent or not implemented
} Q.931, Q.763
1 1 0 0 0 1 0 9 {
Message not compatible with call state or message type non-existent
or not implemented
} Q.931
1 1 0 0 0 1 1 9 {
Information element non-existent or not implemented
(Note 2)
} Q.931, Q.763
1 1 0 0 1 0 0 10 {
Invalid information element contents
} Q.931
1 1 0 0 1 0 1 10 {
Message not compatible with call state
} Q.931
1 1 0 0 1 1 0 10 Recovery on timer expiry Q.931
1 1 0 0 1 0 1 10 {
Parameter non-existent or not implemented - passed on
} Q.931, Q.763
1 1 0 1 1 1 0 11 Inconsistency in data Q.931, Q.730
1 1 0 1 1 1 1 11 Protocol error, unspecified Q.931, Q.763
___________________________________________________________________________________________________________________________________________________
1 1 1 1 1 1 1 12 Interworking, unspecified {
Q.931, Q.763
All other values are reserved.
}
___________________________________________________________________________________________________________________________________________________
Note 1 - In Recommendation Q.763, the words "(national use)" are added.
Note 2 - In Recommendation Q.763, the name of this cause value is "parameter
non-existent or not implemented-discard". Further alignment of
definition for this cause may be required.
Table B-1/Q.699 [2T29.699], p.
B.2.6 Diagnostic(s)
~~~~~
H.T. [T30.699]
TABLE B-2/Q.699
__________________________________________________________________________________________________________________
Cause Diagnostic(s) Recommendations
__________________________________________________________________________________________________________________
1 Condition (Note 1) Q.931, Q.763
2 Transit Network identi Q.931, Q.763
3 Condition (Note 1) Q.931, Q.763
16 Condition (Note 1) Q.931, Q.763
21 {
Condition (Note 1), User supplied diagnostics
} Q.931, Q.763
22 {
New Destination [Q.931]/Called party number (new) [Q.763]
} Q.931, Q.763
29 {
Facility identification [Q.931]/Rejected parameter [Q.763]
} Q.931, Q.730
43 {
Discarded information element identifier(s)
} Q.931
49 Condition (Note 2) Q.931
50 {
Facility identification [Q.931]/Rejected parameter [Q.763]
} Q.931, Q.730
57 Attribute identity (No2) Q.931, Q.763
58 Attribute identity (No2) Q.931, Q.763
65 Attribute identity (No2) Q.931, Q.763
66 Channel type Q.931
69 {
Facility identification [Q.931]/Rejected parameter [Q.763]
} Q.931, Q.730
82 Channel identity Q.931
86 Clearing cause Q.931
88 {
Incompatible parameter [Q.931]
} Q.931, Q.763
96 {
Information element identifier
} Q.931
97 Message type Q.931, Q.763
98 Message type Q.931
99 {
Information element identifier(s) [Q.931]/Parameter name(s) [Q.763]
} Q.931, Q.763
100 {
Information element identifier(s)
} Q.931
101 Message type Q.931
102 Timer number Q.931
103 Parameter name(s) {
Q.931,
Q.763
}
__________________________________________________________________________________________________________________
Note 1 - The following coding is used:
Bit 8: 1 Bits 7-3: 00000 Bits 2-1: Condition as follows: 00 -
Unknown 01 - Permanent 10 - Transient.
Note 2 - The format of the diagnostic field for causes number 57, 58 and 65 is
as shown in Figure B-2/Q.699 and Table B-2a/Q.699 to B-2b/Q.699.
Note 3 - Description in [ ] indicates current difference in description among
Recommendations Q.931 and Q.763. Further alignment may be required for those
cause values, i.e., ##22, ##29 ##50, ##69 and ##99.
Table B-2/Q.699 [T30.699], p.
Figure B-2/Q.699 [T31.699], p. (traiter comme tableau MEP)
Figure B-2a/Q.699 [T32.699], p. (traiter comme tableau MEP)
H.T. [T33.699]
TABLE B-2b/Q.699
Coding of the diagnostic field for causes number 57, 58 and 65
____________________________________________________________
{
Rejected attribute (octet 5a)
}
Attribute No.
{
1.
Information transfer capability:
Bits 7-6 : 00
Bits 5-1 according to Table 4-6, octet 3.
}
{
2.
Information transfer mode:
Bits 7-6 according to Table 4-6, octet 4.
Bits 5-1 : 00000
}
{
3.
Information transfer rate:
Bits 7-6 : 00 .ta
1416u Bits 5-1 according to Table 4-6, octet
4.
}
{
4.
Structure:
Bits 7-5 according to Table 4-6, octet 4a.
Bits 4-1 : 0000
}
{
5.
Configuration:
Bits 7-5 : 000
Bits 4-3 according to Table 4-6, octet 4a.
Bits 2-1 : 00
}
{
6.
Establishment:
Bits 7-3 : 00000
Bits 2-1 according to Table 4-6, octet 4a.
}
{
7.
Symmetry:
Bits 7-6 according to Table 4-6, octet 4b.
Bits 5-1 : 00000
}
{
8.
Information transfer rate (dest. orig.):
Bits 7-6 : 00
Bits 5-1 according to Table 4-6, octet 4b.
}
{
9.
Layer identification:
Bits
7 6
0 1 (layer 1) Bits 5-1 according to Table 4-6, octet 5.
1 0 (layer 2) Bits 5-1 according to Table 4-6, octet 6.
1 1 (layer 3) Bits 5-1 according to Table 4-6, octet 7.
}
{
Available attributes (octet 5b)
The same coding as octet 5a.
____________________________________________________________
Note - Table 4-6 referred to above is found in Recommendation Q.931. The
relevant description is found in S 3.36 of Recommendation Q.763.
Tableau B-2b/Q.699 [T33.699], p.
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