Polycom 1 - Manual (Page 163)

PathNavigator Errors and Q.850 Cause Codes
C - 7
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.
82 Identified channel
does not exist The receiving equipment is requested to use a
channel that is not activated on the interface for
calls.
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.
Code Cause Definition