Polycom V500 Administrator's Manual page 127

Code Cause
98 Message
incompatible with
call state or
message type
nonexistent
99 Information element
nonexistent or not
implemented
100 Invalid information
element contents
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
Definition
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.
The equipment received a message that includes
information elements which were not recognized.
This is usually due to a D-channel error. If this
error occurs systematically, report it to your ISDN
service provider.
The equipment received a message that includes
invalid information in the information element. This
is usually due to a D-channel error.
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.
Appendix
Appendix - 9