Polycom RealPresence 1500 Administrator's Manual page 958

Disconnection Cause
Number Summary
83 A Suspended Call Exists,
but This Call Identity Does
Not Exist
84 Call Identity in Use
85 No Call Suspended
86 Call Having the Requested
Call Identity Has Been
Cleared
87 User Not Member of CUG
88 Incompatible Destination
90 Non-Existent CUG
91 Invalid Transit Network
Selection (national use)
95 Invalid Message,
Unspecified
96 Mandatory Information
Element is Missing
97 Message Type
Non-Existent or Not
Implemented
98 Message is Not Compatible
with the Call State, or the
Message Type is
Non-Existent or Not
Implemented
99 An Information Element or
Parameter Does Not Exist
or is Not Implemented
100 Invalid Information Element
Contents
101 The Message is Not
Compatible with the Call
State
Polycom®, Inc.
Description
A RESUME message cannot be executed by the network as a result of
an unknown call identity.
A SUSPEND message has been received with a call identity sequence
that is already in use.
A RESUME message cannot be executed by the network as a result of
no call suspended.
A RESUME message cannot be executed by the network as a result of
the call having been cleared while suspended.
A CUG member was called by a user who is not a member of the CUG
or a CUG call was made to a non CUG member.
User-to-user compatibility checking procedures in a point-to-point data
link have determined that an incompatibility exists between Bearer
capabilities.
CUG does not exist.
The transit network selection is of an incorrect format. No route (transit
network) exists between the two networks.
Invalid message received. No other disconnection cause applies.
A message was received with an information element missing.
A message was received that is of a type that is not defined or of a type
that is defined but not implemented.
An unexpected message or unrecognized message incompatible with
the call state has been received
A message was received containing elements or parameters that are
not defined or of a type that is defined but not implemented.
A message other than SETUP, DISCONNECT, RELEASE, or
RELEASE COMPLETE has been received which has one or more
mandatory information elements containing invalid content.
A STATUS message indicating any call state except the Null state has
been received while in the Null state.
Appendix A - Disconnection Causes
928