[GreenKeys] 28 typer with a pretty full stunt

[Jim Haynes]

On Sat, 16 Jun 2018, Jeffrey Angus wrote:

> So I gotta ask....
> How do you do "one to many?"
>
> If they're on a local "long loop" how machines can you have in
> series?
>
About the only place where you would have an actual long loop circuit 
would be on a railroad or maybe a pipeline.  I have no idea what the
number-of-stations limit would be.  Most likely you would reach a point
where the circuit is always busy before you would get too many stations
on the line.  And you'd have a choice of neutral or polar, full or half
duplex, and what variety of line relays you are using.

In business installations the single loop is almost always faked as
the actual wires run from one telephone or telegraph office to another,
and then there is a loop from the office to the customer's premises.
So the actual circuit might involve carrier channels, and repeaters that
make the system behave as if it were a single loop.  So again traffic
volume is probably the limiting factor rather than electrical properties
of the circuits.