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ISDN Cause and Diagnostic Codes
202
ISDN Cause and Diagnostic Codes
This section lists all ISDN cause and diagnostic codes according to the ISDN
switch type. These codes can be useful when tracing the source of problems
with an ISDN connection. Note that some cause values may have further
meanings in addition to the diagnostics given. Also, Diagnostic shown as
“None” indicates that the diagnostic is not applicable, not documented, or
unavailable.
Implementation
Country / Region
Page
NI-1
North America
202
TPH1962
Australia
205
Euro and INS-Net 64
Europe and Japan
206
AT&T 5ESS
North America
209
NI-1 (North America)
1. CCITT-standardized cause values:
Hex Cause
Diagnostic
01
Unallocated (unassigned) number
None
02
No route to specified transit network
None
03
No route to destination
None
06
Channel unacceptable
None
07
Call awarded and being delivered in an established channel
None
10
Normal call clearing
None
11
User busy
None
12
No user responding
None
13
No answer from user (user alerted)
None
15
Call rejected
None
16
Number changed
None
1A
Non-selected user clearing
None
1B
Destination out of order
None
1C
Invalid number format (incomplete address)
None
1D
Facility rejected
None
1E
Response to status inquiry
None
1F
Normal, unspecified
None