Polycom ViewStation EX Administrator's Manual page 163

© Polycom, Inc.
Code Cause
101 Message not
compatible with call
state
102 Recovery on timer
expiry
111 Protocol error,
unspecified
127 Interworking,
unspecified
145 ISDN layer 1 and/or
2 link not established
146 ISDN layer 3
connection to the
ISDN switch/network
inactive
255 ISDN command
processing error
Appendix C - Troubleshooting Notes
Definition
The remote equipment received a message that does
not correspond to the current state of the connection.
This is usually due to a D-channel error.
A time-out has triggered an error-handling (recovery)
procedure. This problem is typically temporary.
An unspecified D-channel error when no other standard
cause applies.
An event occurred within a network that does not
provide causes for the action that it takes. The precise
problem is unknown.
User needs to check cabling, ISDN adapter status and
network connections.
There is either a switch protocol error, or (in the United
States or Canada) a SPID assignment problem.
The ISDN signaling code has encountered an error
processing an ISDN action. ISDN adapter busy-wait
and retry.
C-5