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Appendix D ISDN Information
© Polycom, Inc. 207 ViewStation User Guide
42 Switching
equipment
congestion
The network switching equipment is
temporarily overloaded and the destination
cannot be reached.
43 Access information
discarded
The requested access information cannot
be provided by the network.
44 Requested
circuit/channel not
available
An unknown reason prevents the remote
equipment from providing the requested
channel. This might be a temporary
problem.
47 Resource
unavailable,
unspecified
An unknown reason prevents the remote
equipment from providing the requested
channel. This might be a temporary
problem.
49 Quality of service
unavailable
The network cannot provide the requested
quality of service (as defined by CCITT
recommendation X.213). This might be a
subscription problem.
50 Requested facility
not subscribed
The remote equipment supports the
requested supplementary service, but only
by subscription.
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 might
be a subscription problem.
58 Bearer capability
not presently
available
The network normally provides the
requested bearer capability, but not at the
present time. This might be due to a
temporary network problem or to a
subscription problem.
63 Service or option
not available,
unspecified
An unspecified reason prevents the
network or remote equipment from
providing the requested service option.
This might be a subscription problem.
65 Bearer capability
not implemented
The network cannot provide the bearer
capability requested by the user.
66 Channel type not
implemented
The requested channel type is not
supported by the network or the destination
equipment.
69 Requested facility
not implemented
The supplementary service is not
supported by remote equipment.
70 Only restricted
digital information
bearer is available
The network is unable to provide
unrestricted digital information over bearer
capability.
79 Service or option
not available,
unspecified
The network or remote equipment is
unable to provided the requested service
option for an unspecified reason. This
might be a subscription problem.
81 Invalid call
reference value
The remote equipment received a call with
a call reference that is not currently in use
on the user-network interface.
Code Cause Definition