Polycom MP, 128, 512 manual Network and Communications

Troubleshooting

Symptom	Cause	Solution
Network and Communications
		Check the ISDN line connections. The
Line Status icons do not		ViewStation has an S/T interface and
		requires an NT1 to be connected between
go away so video calls	ISDN line is not present.
		the ViewStation and your ISDN line, unless
cannot be made.
		the ViewStation is connected to a PBX. See
		below.
	ISDN number entered	Check the ISDN numbers with your service
	incorrectly.	provider.
	SPID numbers entered	Reset the system by going to the Reset menu
	incorrectly. Note: The AT&T	under the Diagnostics menu. Run Automatic
	point-to-point protocol does	SPID detection again. Make sure your ISDN
	not require SPIDs.	numbers are entered correctly.
	ViewStation is directly	Install an NT-1 between your ISDN line and
	connected to a U interface.	the ViewStation ISDN connection.
	The ViewStation is connected	You do not need an NT1 when connecting to
Line Status icons do not go		a PBX. Connect the ViewStation directly to
	to an NT1 then directly to a	the PBX S/T connection. You may need to
away so video calls can
	PBX. The PBX connection is an	use an ISDN terminating resistor on the
not be made.
	S/T interface.	ISDN line between your ViewStation and the
		PBX.
	Your ISDN line is provisioned	Check that your ISDN line is provisioned for
	incorrectly by your service	Voice/Data, Voice/Data
	provider.
	The ViewStation will auto-	Check with your ISDN service provider and
	detect SPIDS for about 85% of
	all United States and	enter the SPIDs and Switch Protocol
	Canadian switches. The	manually. Note: The AT&T point-to-point
	ViewStation was not able to	protocol does not require SPIDs.
	detect your SPID.
	Check that your ISDN line is	You may want to contact your ISDN provider
	provisioned for Voice/Data,	and ask them to switch your line to the NI 1
	Voice Data.	protocol standard.
Error Message when	ISDN error code received	See the ISDN Information section of this
dialing a video call.	from the ISDN line.	manual.
		The call progress icons indicate the call state
		when placing or receiving a video call on
When placing a call,	Call progress icons indicate	each ISDN channel:
		Blue: – call initiated
progress icons do not turn	that the video call did not
green.	complete.	Yellow: – call arrived at the far end ISDN
		switch
		Orange: – remote system answered call
		Green: – video sync ok

ViewStation User’s Guide 125