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Appendix
© Polycom, Inc. Appendix - 5
28 Invalid number
format
Destination address was incomplete or presented in an
unrecognizable format, which prevented the connection
from being established.
29 Facility rejected The network cannot provide the facility requested by the
user.
30 Response to
STATUS INQUIRY
The equipment returns this message when it receives a
STATUS INQUIRY message.
31 Normal, unspecified A normal event has occurred with no standard cause
applying. No resulting action is required.
34 No circuit/channel
available
The call cannot be taken because no appropriate
channel is available to establish the connection.
38 Network out of order A network problem prevented the call from reaching its
destination. Attempts to reconnect will probably fail until
the network problem is corrected.
41 Temporary failure A network error occurred. The problem will be resolved
shortly. Attempts to reconnect may succeed.
42 Switching equipment
congestion
The destination cannot be reached because the
network switching equipment is temporarily overloaded.
43 Access information
discarded
The requested access information cannot be provided
by the network. The diagnostic message may explain
the problem.
44 Requested
circuit/channel not
available
The remote equipment cannot provide the requested
channel. This may be temporary.
47 Resource
unavailable,
unspecified
An unknown problem prevents the remote equipment
from providing the requested resource.
49 Quality of service
unavailable
The network cannot provide the requested quality of
service (as defined by CCITT recommendation X.213).
This may be a subscription problem.
50 Requested facility
not subscribed
The remote equipment is capable of providing the
requested supplementary service, but is not subscribed
to it.
57 Bearer capability not
authorized
The caller has requested a bearer capability that the
network can provide, but the user is not authorized to
use. This may be a subscription problem.
58 Bearer capability not
presently available
The network normally provides the requested bearer
capability, but cannot provide it now. This may be a
temporary network problem or a subscription problem.
63 Service or option not
available,
unspecified
An unspecified problem prevents the network or remote
equipment from providing the requested service or
option. This might be a subscription problem.
Code Cause Definition