2N BRI Lite/Enterprise v1.1 - Manual (Page 69)

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o Lack of digits in OVERLAP mode – any call that fails to meet the
minimum digits count requirement will be rejected.
o Restricted number prefix – any call whose prefix is not included in any
of the prefix lists will be rejected.
o Selected module / GSM group is not ready – a call will be rejected in
case there is no available GSM module in the selected (by LCR) outgoing
GSM group.
o Selected module / GSM groups are not ready – a call will be rejected in
case there is no available GSM module in the selected (by LCR) outgoing
GSM groups.
Cause translation
The release cause received from GSM/UMTS can be converted into another ISDN
release cause. The resultant ISDN cause number will be converted into a SIP code
according to the table below:
Conversion table:
ISDN
cause
value
Description SIP
code
Description
1 Unallocated number 410 Gone
3 No route to destination 404 Not found
6 Channel unacceptable 503 Service unavailable
16 Normal call clearing BYE
17 User busy 486 Busy here
18 No user responding 480 Temporarily unavailable
19 No answer from user 480 Temporarily unavailable
21 Call rejected 603 Decline
22 Number changed 410 Gone
27 Destination out of order 404 Not found
28 Address incomplete 484 Address incomplete
29 Facility rejected 501 Not implemented
31 Normal, unspecified BYE
34 No circuit available 503 Service unavailable
38 Network out of order 503 Service unavailable
41 Temporary failure 503 Service unavailable
42 Switching equipment congestion 503 Service unavailable
44 Requested facility not
subscribed
503 Service unavailable
47 Resource unavailable 503 Service unavailable
50 Requested facility not
subscribed
503 Service unavailable
55 Incoming class barred within
CVG
603 Decline
57 Bearer capability not authorised 501 Not implemented
58 Bearer cap, unavailable at
present
501 Not implemented