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ServeMaster
Ethernet LAT & Baudot

There are many applications requiring special or proprietary serial code sets and protocols, using 5, 6, 7 and 8 bit character sizes. This site along with standard ascii terminals, uses the 5-bit baudot code set for AFTN applications. This South American airport air traffic control and weather application is just one example where the baudot code set is still used today.

PROBLEM: Migrate this application from a larger VAX platform, where specialized drivers could control serial controllers directly, to VAX workstations that only have Ethernet to connect a large number of serial ports.

SOLUTION: Working with the system integrator, ABLE added a code set translation mode on a per port basis to the ServeMaster LAT terminal server. Coupled with ways to handle line turn-around, ABLE can support Baudot to ASCII and ASCII to Baudot translation in series with the data stream.

The system integrator established a fault tolerant site by shadowing the first computer with the second "standby" computer for immediate take-over of the application. Each ServeMaster handles 16 serial ports with a mixture of 5 bit and 8 bit applications, with extra ServeMasters that can be patched in as a backup.

Because the ServeMaster uses Flash ROM, the protocol development was able to be handled as a down load function. It even allowed special needs that weren't determined until on site integration took place to be handled via internet ftp.

Another application testing the expansion capabilities of ABLE architectures that make a solution possible when there is no other.

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