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Adapters | Drivers | Tools | Additional Info
Linux Penguin - Tux Synchronous Connection to the Internet or Intranet
  • Speeds up to 5 Mbps
  • X.35, X.22, or RS-449 electrical interface
  • RFC 1356 for X.25
  • RFC 1490 for Frame Relay
  • PPP
  • ISA or PCI adapters

Synchronous Overview

Where DSL or cable access is unavailable, Wanware Linux solutions using synchronous leased lines and PPP, X.25 or Frame Relay support high-speed Internet connections. Wanware Linux, combined with standard Linux applications such as Apache and IP, forms the basis of secure Internet access for many organizations. In an Intranet environment, Wanware Linux provides application connection between branch offices and a central location over public packet-switched data networks or private (leased line) facilities.

Wanware Linux for Synchronous Leased Lines Overview

Wanware Linux's synchronous connection options for TCP/IP integrate high-performance serial connections with Intel-based Linux computers. It transfers IP datagrams over synchronous data links running PPP, Frame Relay or X.25 at speeds up to 5 Megabits/second. The product supports up to four adapters available with two or four synchronous ports per adapter.

Hardware

Communications controllers for Wanware Linux are available for the 5 volt and 3.3volt versions of the PCI bus. Electrical interface options include RS-232-C, X.21, V.35 and RS-422. SGP adapters are all bus mastering devices which uses the Zilog Z16C32 VLSI communications controller to transfer communications information directly between memory and serial ports, requiring no intervention on the part of the CPU.

Software

PPP Connectivity

Synchronous PPP offers considerable performance improvements over asynchronous communications, both in terms of the top speed available (5Mb/sec) and the CPU and protocol overheads avoided when compared with a conventional (asynchronous) PPP link. Compared with both X.25 and Frame Relay, synchronous PPP offers considerable simplification for the installer; it is essentially self-configuring, as the two PPP entities negotiate their connection when communication begins.

X.25 Connectivity

RFC 1356 defines the techniques and algorithms to be used for carrying IP traffic over X.25 data links. Wanware Linux conforms to this specification, and exchanges information with any other RFC-compliant router. Wanware Linux controls the use of Switched Virtual Circuits to communicate with remote systems, establishing them and disconnecting them on an "on-demand" basis as traffic levels dictate. Wanware Linux can operate as an X.25 DCE, allowing customers to connect without an intervening public data network to assure reliability in noisy communications environments.

Frame Relay Connectivity

RFC 1490 defines the techniques and algorithms to be used for carrying IP traffic over Frame Relay data links. Wanware Linux conforms to this specification, and exchanges information with any other RFC-compliant router. Wanware Linux can be used to connect devices with no local management interface, or with an intervening Frame Relay data network using any of the common local management interfaces (LMIs): Frame Relay Consortium, ANSI Annex D, and CCITT Annex A.

Other Wanware Linux Protocols