User's Manual
Appendix A-Disconnection Causes
Polycom, Inc. A-11
103 Parameter Non-
Existent or Not 
Implemented – Passed 
On (national use)
A message was received containing parameters that are not 
defined or of a type that is defined but not implemented.
110 Message with 
Unrecognized 
Parameter Discarded
A message was discarded because it contained a parameter 
that was not recognized.
111 Protocol Error, 
Unspecified
A protocol error has occurred. No other disconnection cause 
applies.
127 Interworking, 
Unspecified
An interworking call has ended. 
Table A-2  ISDN Disconnection Causes (Continued)
Disconnection Cause
Number Summary Description










