Polycom Webcam - Manual (Page 27)

Chapter 1 - Welcome to the ViewStation EX
© Polycom, Inc. 2003 25
Software Update appears when you power on the ViewStation
EX system.
The system software is corrupt or not loaded properly. Load system
software on the system from your PC. For instructions on how to do
this, refer to
Upgrading Software , or consult your network
equipment provider.
A lightning bolt indicator appears on the left side of your far or
near-site screen.
The lightning bolt is only a visual indicator that informs you about
WAN or LAN network problems. It does not indicate performance
problems with your system.
If you are in an H.320 call, the lightning bolt most likely indicates
that the telephone company is experiencing bit errors on the line.
Contact and inform your telephone company of the existing
problem.
If you are in an H.323 call, the lightning bolt may signify that your
LAN network is experiencing packet loss, accompanied by video
and audio degradation. Contact your network manager.
The lightning bolt works differently in H.320 and H.323 calls for
software version 2.5 and above:
❑
In H.320 calls, the lightning bolt appears if there are 3 or more
CRC (Cyclic Redundancy Check) errors within a period of one
second, or if there are 10 or more FEC (Forward Error
Correction) errors in a period of one second.
❑
In H.323 calls, the lightning bolt appears if more than 100 audio
and video packets are lost. The display counter is reset each time
the lightning bolt appears.
The lightning bolt is triggered when your system detects a certain
level of packet loss on the network. The frequency of the packet loss
rate can be adjusted using the remote control shell (either via RS-232
or via Ethernet/Telnet). .Refer to the ViewStation EX, ViewStation
FX, and VS4000 ARENA API Programmer’s Guide.