Alcatel Carrier Internetworking Solutions Switch/Router ユーザーズマニュアル

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 Application Examples
Page 28-9
Combined Frame Relay with ISDN Backup
In a typical configuration, the 
WSX
 occupies either a slot in a switch chassis or a submodule 
on an OmniAccess 512. Because it is compatible with Omni Switch/Router any-to-any 
switching and 
VLAN
 architecture, you can switch other topologies in the 
LAN
 to Frame Relay 
or PPP. The 
WSX
 connects to a 
DSU/CSU
 or T1 multiplexer through a serial cable. The 
following diagram shows a typical 
WSX
 setup using a 56 kbps Frame Relay line (up to 2 Mbps 
access rates are supported)
Refer to the Chapter 29, “Managing Frame Relay,” and Chapter 56, “Backup Services,” for 
details on how to implement this configuration.34
.
WSX
56 kbps Line
DSU/CSU
Serial 
Omni Switch/Router
Frame Relay 
Network
ISDN
Network
DTE-DCE Cable
PPP