Appendix F ISDN Information
ViewStation FX/VS 4000 User’s Guide 206 www.polycom.com
127 Interworking, unspecified
An event occurred, but the network 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
A switch protocol error exists, or (in the United
States or Canada) a SPID assignment problem.
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.
(Continued)
Code Cause Definition
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