Vanguard Managed Solutions Vanguard 342 Benutzerhandbuch

About the Vanguard 342 

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This table describes the application types shown in Figure 1-5 and lists the various 
daughtercards used for connectivity over a private or public frame relay network:

Branch access to 
Central Office

DSU DIM, FXS/FXO 
and ISDN 
Daughtercards

The Vanguard 342 supports voice, video and data traffic 
between the branch and central office over private or 
public network. The FXS/FXO Daughtercard supports 
telephones, PBX, and faxes. Connect a telephone or 
PABX to one FXS port on the FXS/FXO Daughtercard 
and all branch telephones have access to the central office 
PBX. This eliminates long distance telephone charges 
between the branch and central office.

ISDN Backup 
link between 
Branch and 
Central Office

DSU DIM, FXS/FXO 
and ISDN 
Daughtercards

To provide an alternative path in case of network failure, 
you can configure and connect serial ports to an external 
analog modem or switch 56K DSU. As Figure 1-5 
illustrates, you can also configure ISDN for WAN 
backup.