Technical data

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