Vivotek IP3111/3121 - Manual (Page 24)

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