I’m not sure why I didn’t think of this before. How about the MS-3 from
BlackBox? It has one DTE port and three DCE ports on it (or is it the other way
around?). BlackBox also makes a larger box with eight ports but I’m not sure if
it’s an “MS-8” or they call it something different.
We use
And that is why it will not work with multiple computer applications -
they run independently and 'talk' whenever they want to.
LP-Bridge solves that problem by buffering the individual requests. Plus
it also buffers some K3 information so it can respond to some of the
application requests
George,
Since RS-232 is a point-to-point protocol, multiple TX drivers cannot
exist together.
Yes, tri-state RS-232 drivers can be constructed (and were likely used
in your particular arrangement), but only one driver can be allowed to
be active at one time. The fact that you say the drivers
Harry,
Years ago we used 8 devices controlled from one PC com port on one RS-232
data link.
All of the devices bridged the receive line and were wire or'd for transmit.
The devices were polled by the PC and only allowed to transmit when polled.
This worked well with no conflicts for many years.
Don,
In the relatively early days of Packet Radio there were more than a few
multi-port NET-ROM nodes that were assembled by tying three (or more)
TNC-2s together with a relatively simple diode combiner.
I may even still have the diagram for combiner. It wasn't powered,
didn't have
P.S. the big secret is that you can't run pure ASCII with no other
protocol and pull this off. All of the devices have to know when to
talk, and when to shut up.
On 1/5/2015 9:34 PM, Lynn W. Taylor, WB6UUT wrote:
Don,
In the relatively early days of Packet Radio there were more than a
few
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