CSX400 and CSX400-DC User’s Guide vContentsCHAPTER 1 INTRODUCTIONRelated Documentation .................................................................................. 1How to Use This Guide ................................................................................... 1Document Conventions................................................................................... 3Getting Help .................................................................................................... 4CHAPTER 2 ABOUT THE CSX400CSX400 Hardware .......................................................................................... 5WAN Connection ...................................................................................... 5Ethernet LAN Connection......................................................................... 7Remote Management Capabilities .................................................................. 7Optional Features ........................................................................................... 8CSX400 Firmware Support ............................................................................. 8IEEE 802.3 Ethernet................................................................................. 8WAN Protocols ......................................................................................... 9Firmware Data Compression.................................................................. 10Inverse Multiplexing (IMUX) ................................................................... 10HDLC...................................................................................................... 11DHCP and NAT ...................................................................................... 11Point-to-Point Protocol (PPP) ................................................................. 12PAP and CHAP Security ........................................................................ 12LQM........................................................................................................ 13Multilink Protocol .................................................................................... 13ISDN ....................................................................................................... 14ISDN Back-up......................................................................................... 15HDSL ...................................................................................................... 16Bridging and Routing .............................................................................. 16Bridging and Routing Protocol Filtering .................................................. 18System Passwords ................................................................................. 18Simple Network Management Protocol (SNMP) .................................... 19Software and Firmware Upgrades.......................................................... 22