ViewStation EX, ViewStation FX Administrator's Guide VS4000
Administrator’s Guide for ViewStation EX, ViewStation FX, and VS4000
C-4  www.polycom.com/videodocumentation
83 A suspended call 
exists but this call 
identity does not
The network received a call resume request that 
contained a call identity information element that does 
not match any suspended call. 
84 Call identity in use The network received a call suspend request that 
contained a call identity information element for a call 
that is already suspended.
85 No call suspended The network received a call resume request when there 
was not a suspended call pending. This might be a 
transient error that will be resolved by successive call 
retries.
86 Call having 
requested call 
identity has been 
cleared
The network received a call resume request containing 
a call identity information element for a call that was 
cleared while suspended, either by timeout or by the 
remote user.
88 Incompatible 
destination
Indicates that an attempt was made to connect to 
non-ISDN equipment, such as an analog line.
91 Invalid transit 
network specified
The ISDN exchange was asked to route the call through 
an unrecognized intermediate network.
95 Invalid message, 
unspecified
An invalid message was received, for an unknown 
reason. This is usually due to a D-channel error. If this 
error occurs systematically, report it to your ISDN 
service provider.
96 Mandatory 
information element 
is missing
The equipment received a message that did not include 
one of the mandatory information elements. This is 
usually due to a D-channel error. If this error occurs 
systematically, report it to your ISDN service provider.
97 Message type 
nonexistent or not 
implemented
The equipment received a message of a type that is 
invalid or not supported. This code indicates either a 
problem with the remote configuration or a problem with 
the local D channel.
98 Message 
incompatible with 
call state or 
message type 
nonexistent
The equipment received a message that is not valid in 
the current call state. Cause 98 is usually due to a 
D-channel error. If this error occurs systematically, 
report it to your ISDN service provider.
99 Information element 
nonexistent or not 
implemented
The equipment received a message that includes 
information elements which were not recognized. This is 
usually due to a D-channel error. If this error occurs 
systematically, report it to your ISDN service provider.
100 Invalid information 
element contents
The equipment received a message that includes 
invalid information in the information element. This is 
usually due to a D-channel error.
Code Cause  Definition










