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18 Appendix
B) CAUSE-Messages – DSS1 Protocol
Dec. Cause
Unallocated (unassigned) number
01
No route to specified transit
02
network
No route to destination
03
Channel unacceptable
06
Call awarded and being delivered in
07
an established channel
Normal call clearing
16
User busy
17
No user responding
18
No answer from user (user alerted)
19
Call rejected
21
Number changed
22
Non-selected user clearing
26
Destination out of order
27
Invalid number format (address
28
incomplete)
Facility rejected
29
Response to STATUS ENQUIRY
30
Normal, unspecified
31
No circuit / channel
34
available
Network out of order
38
Temporary failure
41
Switching equipment
42
congestion
Access information
43
discarded
Requested circuit / channel not
44
available
Resources unavailable, unspecified
47
Quality of service
49
unavailable
Requested facility not subscribed
50
Bearer capability not authorized
57
Bearer capability not presently
58
available
140
Description
No access under this call
number
Transit network not reachable
Wrong route or
routing error
B-channel for the sending system
not acceptable
Call awarded and connected in
an
already existing channel
(e.g., X.25 SVC)
Normal disconnect
The number called is busy
No terminal equipment answered
(Timer NT303 / NT310 time-out)
Call time too long
Call rejected (active)
Call number has been changed
Incoming call not awarded to this
terminal
Destination / access
out of order
Wrong call number format or call
number incomplete
The facility is not offered
Response to status enquiry
Unspecified for
"normal class" (Dummy)
No circuit / B-channel available
Network not operational
Network is temporarily not
operational
Switching equipment is
overloaded
Access information could
not be transferred
Requested circuit / B-channel is
not available
Unspecified for "resource
unavailable class" (Dummy)
The requested quality of
service is not available
Requested service attribute is
not subscribed
The requested bearer capability
is not enabled
The requested bearer capability
is not currently available
ARGUS 3u plus/3u NT
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