Vivotek VS3102 - Manual (Page 44)

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“Secondary FTP passive mode” Passive mode setting for the backup FTP server.
In both methods, a "2nd" server can be provided for backup connection for “1st”. However the primary
server information should be entered first. If the primary server is not set, the related FTP or email will be
deactivated. Note that it may take time to connect to the secondary server after the first one fails and it
may affect some applications when conditions happen too often. For SMTP, video server will
automatically try to connect to 2nd SMTP server while failing to send out to 1st SMTP caused by any
wrong SMTP information.
For security or network integration, Administrator also can hide the server from the general HTTP port by
changing "HTTP port" to other than default 80. “Local FTP server port” can also be changed to other
than default 21. These ports of “Control Channel Port”, “Audio Channel Port” and “Video Channel
Port” which are used in media transmission can also be changed. Administrator should have enough
acknowledge before changing the default port.
NOTICE: if video server is behind NAT, port mapping is necessary for connection outside NAT.
HTTP port, control channel port, video channel and audio channel port totally 4 ports mapping
needs to set in the NAT router to enable fully video and audio streaming by video server.
If the Video Server works in variation or low bandwidth (comparing with video bandwidth) environment,
the client side will receive the poor quality of media. For improving this situation, you can check the
“Improve audio quality in low bandwidth environment” item. It can make the audio quality better, but
the media delay is longer and real-time issue is bad. If the network performance is worst, please select
the”UDP protocol“as the communication protocol in “client setting”
The Video server can disable audio streaming by check “Mute” check box. Any client connect to the
Video Server will receive video only. Once “Mute” is checked, the LED2 for heart beating status will
blink about every 2 seconds. It would be obviously slower than the normal condition with both video and
audio streaming. This way user can tell video server’s streaming behavior just from LED2
After everything is set, click on . A warning message will pop up. Click on to confirm. The
Video Server will automatically restart. If "Reset network at next boot" is kept checked, run the installer
procedure again. Otherwise the Video Server will restart automatically.