Switch User's Guide

CSX400 and CSX400-DC User’s Guide 5
2 About the CSX400
The CSX400 (Figure 1) is an access device that provides Ethernet Local Area Network (LAN)
connectivity via two Ethernet Port Interface Modules (EPIMs), and offers high-speed Wide Area
Network (WAN) access to remote sites via two WAN Port Interface Modules (WPIMs). The
CSX400 supports IEEE 802.1d transparent bridging, IP and IPX routing, ISDN, Dynamic Host
Configuration Protocol (DHCP), Network Address Translation (NAT) routing, and Inverse
Multiplexing (IMUX) between Ethernet LANs across a WAN.
The CSX400 operates from a standard ac power source and the CSX400-DC operates from a dc
voltage source to meet all the requirements for installation into Telephone Central Office facilities.
Figure 1 The CSX400
CSX400 Hardware
This section details the CSX400 hardware capabilities.
WAN Connection
The CSX400 supports Point-to-Point Protocol (PPP) including: Link Control Protocol (LCP),
BNCP, IPCP, IPXCP, LQM, Multilink Protocol (MP) and CHAP and PAP, ISDN-BRI and Frame
Relay protocols through one of the following WAN port interface modules (WPIMs):
• The WPIM-T1 provides a T1 interface through a front panel RJ45 port and includes a built-in
Channel Service Unit/Digital Service Unit (CSU/DSU) for direct connection to a T1 line. The
WPIM-T1 provides both Full T1 or Fractional T1 using 56 or 64 Kbps Time Slots, with a total
throughput of up to 1.544 Mbps.