Polycom SoundStation2 EX, FX, VS4000 Integrator's Reference Manual page 125

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Table 6-7. ISDN Call Status Codes (Continued)
Code Cause
21 Call rejected
22 Number
changed
26 Non-selected
user clearing
27 Destination out
of order
28 Invalid number
format
29 Facility rejected
30 Response to
STATUS
INQUIRY
31 Normal,
unspecified
34 No
circuit/channel
available
38 Network out of
order
41 Temporary
failure
Chapter 6 - Testing and Troubleshooting
Definition
The destination equipment is capable of
accepting the call, but has rejected it for an
unknown reason.
The ISDN number used to set up the call is
no longer valid. (The diagnostic field of the
message may return an alternate address
assigned to the called equipment.)
The destination is capable of accepting the
call, but did not assign it to the user.
A signaling message cannot be delivered
because the interface is not functioning
correctly, and the destination cannot be
reached. This condition might be temporary;
for example, remote equipment might be
turned off.
Destination address was incomplete or
presented in an unrecognizable format,
which prevented the connection from being
established.
The network cannot provide the facility
requested by the user.
The equipment returns this message when it
receives a STATUS INQUIRY message.
A normal event has occurred with no
standard cause applying. No resulting
action is required.
The call cannot be taken because no
appropriate channel is available to establish
the connection.
A network problem prevented the call from
reaching its destination. Attempts to
reconnect will probably fail until the network
problem is corrected.
A network error occurred. The problem will
be resolved shortly. Attempts to reconnect
may succeed.
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