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 <[email protected]> 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? > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
