Nokia IPSO 4.0 Reference Manual page 67

Table 5 ISDN Cause Code Fields
Cause Code
z1
z2
a1
a2
ISDN Cause Values
Descriptions of the cause-value field of the cause-information element are shown in the
following ISDN cause value table. Cause-value numbers are not consecutive.
Table 6 Cause Values
Cause Cause Description
1
2
3
6
7
16
17
18
19
21
22
26
27
28
29
Nokia Network Voyager for IPSO 4.0 Reference Guide
Description
Class of cause value
Value of cause value
(Optional) Diagnostic field that is always 8.
(Optional) Diagnostic field that is one of the following values: 0 is
Unknown, 1 is Permanent, and 2 is Transient
Unallocated (unassigned) number
No route to specified transit network
No route to destination
Channel unacceptable
Call awarded and being delivered in an
established channel
Normal call clearing Note 12
User busy
No user responding
No answer from user (user alerted)
Call rejected
Number changed
Non-selected user clearing
Designation out of order
Invalid number format
Facility rejected
Diagnostics
Note 12
Transit-network identity (Note 11)
Note 12
User-supplied diagnostic (Notes 4 & 12)
Facility identification (Note 1)
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