Back in 2004 when I was involved in airtraffic control operations, teletype was still there as backup for the PC based solution. Don't know the status 18 years

Back in 2004 when I was involved in airtraffic control operations, teletype was still there as backup for the PC based solution. Don't know the status 18 years later By the way the software used was based on win3.1 with a secondary partition with Linux and relevant software which was the secondary option as their audience was not accustomed to Linux UI at the time - that is their words