4xem IPVS1A, Руководство пользователя

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20
Modem Environment
Hardware installation
Before installing Video Server, 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, Video Server 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, Video Server 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, Video Server 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 Video Server waiting for a phone
call to establish a point-to-point connection. Dial-out connection denotes an active Video Server
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.