Re: Closed system (was: PC connection via twinax ?)

Ken,

>       I believe most of the functions were used in a device called the 
>"transition data link", device, 

I think that may have been the name for the model which only did the data
transfer, not the A/B switching too.  Last one of these I did was back in 1990
with the original model which cost over $5K if bought separately.

>       Largere outfits, with a lot of 36s, bought one, and used it themselves,
>otherwise, theu used it thru a third party support arrangement.

Or in my case, just had IBM throw it in free as part of a migration incentive
package.

>       If I am correct, the s/36 was a very popular, and widely used business
>os, right into the 90's.

VERY popular.  The S/36 refused to die, despite IBM's best efforts to bury it

Doug