[Elecraft] Is anyone using a Hardware Data Switch instead of LPBridge?

[Joel Black]

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 these at work for SCADA.

They also make a smaller version of the MS-3 where they use RJ-48s instead of DB-25s.

Before you ask, they do work for two-way communications, but on the MS-3, you’ve got to make sure what kind of device you’re hooking up. It only works one way but it does allow bi-directional communications.

73,
Joel - W4JBB

> On Jan 5, 2015, at 9:43 PM, George Danner <gdanner at windstream.net> wrote:
> 
> 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.
> So it is possible to use one RS232 port for multiple devices -but- the 
> devices must be made to play nice in all circumstances and have special 
> hardware interfaces.
> My best memory is we spent about 20 man hours developing the hardware 
> solution and another 100 hours writing & debugging software. BTW this was in 
> DOS days!
> 
> 73 George AI4VZ
> --------------------------------------------------------------------------
> -----Original Message----- 
> From: Harry Yingst via Elecraft
> While LP Bridge does serve the purpose I was wondering if anyone was usinga 
> pure hardware solution to share the K3's serial port across applications.
> If so how are you doing it? 
> 
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