ATN OSI Transport - An ICAO SARPS compliant transport for Air Traffic Service Message Handling systems (AMHS)

Boldon James OSI Transport is a robust reliable mature product with two decades of development effort and expertise invested. As one of the most popular OSI Transport Stacks in the world it has been installed in more than 50,000 locations in the UK alone. Our Aeronautical Telecommunications Network (ATN) OSI Transport is based on our OSI Transport Stack and is available on all Microsoft Windows platforms and common UNIX platforms including Linux, Solaris, AIX and SCO OpenServer.

The ATN OSI Transport supports the ICAO ATN standards for transport and network layer services, as well as our Aviation Message Handling System built on Microsoft Exchange Server. It also supports native X.400 MTAs including ISODE’s M-Switch.

For Microsoft Windows platforms it’s a high-performance native transport driver supporting the Microsoft defined Transport Device Interface (TDI) at the top and the Microsoft NDIS interface (for Ethernet LAN access) at the bottom.

For UNIX, it’s an in-kernel STREAMS module supporting the XTI at the top and the DLP/LLI (for Ethernet LAN access) and NPI/TPI (for X.25 access) interfaces at the bottom.

ATN ISO Transport

The OSI Seven Layer model with Boldon James OSI transport managing the Network and Transport elements

SARPS Edition 3 Support

Transport to network priority mapping
Support of ATN security labels
Configurable transport timers
Enhanced encoding of acknowledgement time parameter
Encoding and use of security parameter
Management of network priority
Echo Request and Response function.

Key Benefits

Reliability
Proven solution that has been in use for over 20 years.
Performance
The OSI Transport can support 8,000 concurrent connections and runs on the latest operating systems.
Functionality
Includes many additional features to ease implementation and task management.
Diagnostics
The diagnostic tools support connections to alien systems and significantly reduces implementation time.

Key Features

ISO 8073 Connection Oriented Transport Protocol Class 4 over ISO 8802-3 LAN
ISO 8473 Connectionless Network Protocol (CLNP)
ISO 9542 End System to Intermediate System routing exchange protocol (ESIS)
Dynamic addressing for use when the full CLNP is not used. This is used for environments such as Fujitsu’s IPA3 OSLAN, where there is not a network protocol and therefore no ESIS
Support for multiple LAN LSAPs
Support for multiple LAN cards and sub-networks
Transport connection switching. This is used when communicating over null CLNP to systems that may switch the LAN sub-network address used by their transport connection e.g. Fujitsu’s multi-node VME
Extensive tracing, diagnostic and statistics facilities.

System Requirements

Windows Operating System version 2000, XP, 2003
UNIX – Linux, Solaris, AIX, SCO OpenServer

Further information

A PDF version of this information is available in our reference library. Alternatively please contact us with your questions