Chapter 2: About the HSIM-W68 HSIM-W6 User’s GuideOptional FeatureHardware Data Compression Module (CSX-COMP/ENCR) — The same industry standardSTAC Electronics Stacker LZS Compression algorithm supported by HSIM-W6 software is madeavailable by an optional hardware data compression module that accelerates data compression forthe HSIM-W6 over PPP and Frame Relay. Depending on the packet type and size, hardware datacompression provides a minimum of 2:1 data compression, giving 3 Mbps throughput on each T-1WPIM interface. To use the hardware data compression module, compatible equipment (such asthe HSIM-W6, CSX200, and CSX400 or other vendors’ equipment which conforms to theapplicable standards), must be in use at both ends of the WAN link. When the hardware datacompression module is installed on the board, it automatically assumes the compression task fromsoftware. There is no configuration necessary to prioritize hardware over software compression.HSIM-W6 Firmware SupportThe HSIM-W6 firmware supports IEEE 802.1d bridging, and IP and IPX routing, and OSI Layer 2Inverse Multiplexing (IMUX), which allows both WAN channels to be used as a single, highbandwidth, WAN channel. Wide Area Networking includes Point-to-Point Protocol (PPP),Frame Relay, and ISDN. Remote access is via Full or Fractional T1, E1, Synchronous, DigitalData Service, ISDN BRI, or HDSL connections.This device supports industry-standard protocols, security features, compression algorithms andnetwork management tools to ensure interoperability with equipment from other vendors.WAN ProtocolsThis device supports the following WAN protocols over the WAN port:• Point-to-Point Compression Control Protocol (CCP) as defined by RFC 1962• Point-to-Point Protocol (LCP) as defined by RFC 1661• Point-to-Point Protocol (BNCP) as defined by RFC 1638• Point-to-Point Protocol (IPCP) as defined by RFC 1473• Point-to-Point Protocol (IPXCP) as defined by RFC 1552• Frame Relay as defined by RFC 1490• Frame Relay Data Compression Protocol (DCP) as defined by FRF.9• Inverse Multiplexing (IMUX)
