Tripp Lite B0930082E4UM Owners Manual for B093- B097- and B098-Series Console - Page 75

5. Firewall, Failover and OOB Access To ensure high availability, the console server has a number of out-of-band access capabilities and transparent failover features. If there is difficulty in accessing the console server through the main network path, all console server models provide out-of-band (OOB) access and the Administrator can still access it (and its Managed Devices) from a remote location. • All console server models support serially attaching an external dial-up modem and configuring dial-in OOB access. Some models with USB ports support attaching an external USB modem. Some models also come standard with an internal modem. These modems can also be configured for dial-in OOB access. • All console server models with an internal or external attached modem (and firmware version 3.4 or later) can be configured for out-dial to be permanently connected. • The advanced console server models can also be configured for transparent out-dial failover. In the event of a disruption in the principal management network, an external dial-up ppp connection is automatically established. • These advanced console server models can also be accessed out-of-band using an alternate broadband link and offer transparent broadband failover. • Models with an internal cellular modem can be configured for OOB cellular access, cellular transparent failover, or as a cellular router. 5.1 Dialup Modem Connection To enable dial-in or dial-out, first ensure there is a modem attached to the console server. • All models support external USB modems. The USB modem will be auto-detected and an External USB Modem Port tab will appear under System -> Dial (in addition to the Serial DB9 Port tab). All console server models supports an external modem (any brand) attached via a serial cable to the console/modem port for OOB dial-in access. • The serial ports on the B093 are by default configured as RJ serial console server ports. However, Port 1 can be configured to be the local console/modem port. 5.2 OOB Dial-In Access Once a modem has been attached to the console server, you can configure the console server for dial-in PPP access. The console server will then await an incoming connection from a dial-in at remote site. Next, the remote client dial-in software needs to be configured to establish the connection between the Administrator's client modem to the dial-in modem on the console server. 75