Polycom VSX Series manual Go to Admin Settings Network IP Quality, Diagnostics Call

			Diagnostics and General Troubleshooting
Symptom	Problem	Corrective action
Edges of picture are cut off	Graphics from the far site	Use a VGA monitor to display graphics.
when viewing graphics.	are displayed on an NTSC
	monitor.
	The laptop’s display	Be sure the laptop’s refresh rate is set to 60 Hz, and
	resolution or refresh rate	that the laptop and the Visual Concert VSX use the
	does not match the settings	same display resolution.
	for the Visual Concert VSX.
Call participants cannot see	The VCR or DVD is not	Select the VCR (Camera 3):
or hear what is being	selected.	Press	Camera, then press 3.
played on the VCR or DVD.
	The VCR or DVD is not set	Check that the VCR or DVD is connected according
	up correctly.	to the instructions in the section Connecting
		VCR/DVDs on page 2-28.
		Refer to the manufacturer’s instructions to set up the
		VCR or DVD correctly.
Picture freezes frequently	There is too much traffic on	Go to Admin Settings > Network > IP > Quality of
or becomes blocky during	the LAN. Check the error	Service and enable dynamic bandwidth.
an IP call.	count on the Call Statistics
	screen.
	The network is	Go to Admin Settings > Network > IP > Quality of
		Service and specify a smaller value for Maximum
	experiencing packet loss.
		Transmission Unit Size.
Picture freezes frequently	Too many network line	Try the call again.
during an ISDN call.	transmission errors. Check
	the error count on the
	Diagnostics > Call
	Statistics screen to verify
	this.
	Network interface cable or	Replace the cable or cables.
	cables may be bad.
Picture is slow or jerky.	The system is receiving	A background with less motion provides a better,
	video that includes a large	smoother video picture.
	amount of motion.
	Too many network line	Try the call again, possibly at a lower network speed.
	transmission errors. Check
	the error count on the
	Diagnostics > Call
	Statistics screen to verify
	this.
	Only one 64 Kbps channel	Check the ISDN number of the far site. Ask the far
	is connecting in your call.	site to call your site.

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