User's Manual
Integrators’ Reference Manual for ViewStation EX, ViewStation FX, and VS4000
116 www.polycom.com
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.
65 Bearer 
capability not 
implemented
The network is not capable of providing the 
bearer capability requested by the user.
66 Channel type 
not 
implemented
The requested channel type is not 
supported by the equipment sending this 
code.
Table 6-7. ISDN Call Status Codes (Continued)
Code Cause  Definition










