Polycom VSX Series manual Isdn

Appendix

Code	Cause	Definition
127	Interworking,	An event occurred within a network that does not
	unspecified	provide causes for the action that it takes. The
		precise problem is unknown.
145	ISDN layer 1 and/or	User needs to check cabling, ISDN adapter status
	2 link not	and network connections.
	established
146	ISDN layer 3	There is either a switch protocol error, or (in the
	connection to the	United States or Canada) a SPID assignment
	ISDN	problem.
	switch/network
	inactive
255	ISDN command	The ISDN signaling code has encountered an
	processing error	error processing an ISDN action. ISDN adapter
		busy-wait and retry.

Appendix - 15