Alcatel Carrier Internetworking Solutions Omni Switch/Router - Manual (Page 827)

Page 28-1
28 Managing WAN Switching
Modules
Introduction
The Omni Switch/Router WAN Switching Modules (WSXs) are a family of modules that
enable the creation of WANs by providing connectivity between geographically-distanced
LANs. These modules support a variety of protocols, including Frame Relay, synchronous
Point to Point Protocol (PPP), and Integrated Services Digital Network (ISDN).
WSXs extend the power and flexibility of LAN switching over greater geographic distances
using either a Frame Relay network, ISDN network or leased line connection, such as T1. In a
Frame Relay network configuration, WSXs provide a cost-effective link that is capable of
supporting multiple virtual circuits. In a leased line configuration, WSXs provide dedicated
bandwidth to a single remote site. In an ISDN line configuration, the WSX supports both
inbound and outbound call circuits for interconnection to remote WAN Switching Modules or
other devices that support standard PPP over ISDN. In addition, an ISDN configuration
supports bandwidth on demand and backup of failed lines.
The family of WSX modules provides either 2, 4, or 8 ports, which provide a range of access
rates from 9.6 kbps to 2 Mbps. Management, data handling, compression, and multi-protocol
encapsulation are compatible with the current Frame Relay and PPP standards.
VLAN architectures are preserved and consistent on both sides of a WAN link. WSX s support
Alcatel Frame Relay trunking. As a result, VLAN groups on one side of a Frame Relay link are
compatible with those on the other side. In addition, the WSX is capable of both Frame Relay
and PPP transparent bridging, and IP and IPX routing.
VLAN architectures are preserved and consistent on both sides of a WAN link. The WSX
supports standard RFC 1490 multiprotocol over Frame Relay and synchronous PPP for
bridging and routing interoperability with numerous other WAN networking devices. In
addition, the WSX supports Alcatel Frame Relay trunking, so multiple VLAN groups on one
side of a Frame Relay link can be transported across the WAN.