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