Polycom SoundStation2 EX, FX, VS4000 Integrator's Reference Manual page 129

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Table 6-7. ISDN Call Status Codes (Continued)
Code Cause
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
Chapter 6 - Testing and Troubleshooting
Definition
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.
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