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LAPB/LAPD/LAPV5 Software for CCITT/ITU Standards

Overview

Adax APS-LAPX is a streams software module and API that supports the LAPB, LAPD and LAPV5 layer 2 data communications protocols. It provides application programmers with a complete development environment for layer 2 protocols and as a member of the Adax Protocol Software (APS) product line it supports the principles of flexibility, high performance, and open standards conformance that define the Adax commitment to its customers. Together with the APC line of communications controllers, APS-LAPX is a high performance, highly integrated communications solution for billing applications or wireless network infrastructure.

Application Programmers Interface

A C language library is provided to allow application programmers to easily access all of the features in APS-LAPX and there are various modes of operation for different applications. The programmer can select from the following modes of operation:

• LAPB/LAPD/LAPV5 protocol modes
• Supermultiplexing mode
• Half Window Acknowledgment mode
• LAPB/LAPD/LAPV5 Protocol Modes
  

The Adax LAPX module can support:

• The LAPB protocol as specified in CCITT X.25
• The LAPD protocol as specified in CCITT Q.921
• The LAPV5-DL over LAPV5-EF protocols as specified in ETSI standard ETS 300 324-1:1996.
• LAPD connections encapsulated over LAPV5-EF. Every connection bound to a single module will utilize the same protocol, but every instance of the LAPX module may run a different protocol.

Performance is in the Details

The Supermultiplexing mode allows the user to bind more than one connection to a single module enabling up to 2,048 connections on a single Adax ACT/8 card. LAPX can be used singularly or in conjunction with other Adax product such as X.25 and Frame Relay or with 3rd party products in a number of different applications. By setting the Half Window Acknowledgment mode the module will only send RR acknowledgments when the window is half full. This does not affect the normal operation of the LAPX module but it significantly reduces the CPU utilization and improves the throughput of the line.

Integration Expertise

Adax adds a key ingredient no other company can match – expert technical services. Combined with Adax integrated software modules and hardware products, our technical expertise helps you build the highest performance foundations for your network. You can count on Adax to be there with you. No matter what changes may occur in operating systems, bus architectures, applications, or protocols, Adax has been and will continue to be your direct connection to the world.

Operating Systems Support and Adax Protocol Controllers

All Adax products are available for PCI, cPCI and PMC architectures, supporting Linux and Solaris Operating Systems. VxWorks, HP-UX and IBM AIX are also supported for certain products.

The FR/PPP software operates with the following Adax products: HDC High Density Channelized Controller for Multiple Protocols ACT Channelized Controller for HDLC, LAPB/D and Frame Relay

Adax Software

Adax Protocol Software (APS) is a suite of products designed to get the most out of each Adax hardware product and is supplied with a set of common APIs enabling simple integration of the upper layers. Adax HDLC, SS7, SCTP, SSCOP, X.25, Frame Relay, LAPB, LAPD and LAPV5 provide a well-balanced, high performance, low overhead direct connection to the network.

Fastest Time to Market

Adax provides extremely fast time to market through simplicity of design and a modular product range. This common software interface ensures a simple migration path and provides a flexible and portable solution. The API’s between products remain the same preserving the investment in the higher layer software and applications. This compatibility enables quick upgrades to next generation requirements and easy field upgrades to expand the capabilities of installed systems