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Modem Environment
Hardware installation
Before installing VisualServer, the administrator should memorize the serial numbers on the packages
respectively for the initial passwords.
To use a dial-up network, the Ethernet socket should be left disconnected since Ethernet is the first
priority among available interfaces. After powering up, VisualServer will detect if any external modem is
connected to the modem port. Once a modem is detected, the heartbeat LED will flash periodically. If no
modem responds, VisualServer will assume the included null modem cable is connected to perform
system configuration. Then both lower LEDs will turn on until null modem connection is established.
If users have setup a remote dialup server or subscribed to an ISP service, VisualServer can be configured
to dial to the server upon special events. Otherwise it will wait permanently for the user’s call to establish
a network connection to provide services.
In the following content, dial-in connection denotes a passive VisualServer waiting for a phone call to
establish a point-to-point connection. Dial-out connection denotes an active VisualServer to dial out to the
other end of a dial-up server or any Internet service provider, abbreviated as ISP, to request a
point-to-point connection.