"T. Wesley Erickson" wrote:
>
> The RJ11 Line1 and Line2 (and optional Line1 + Line2) adapters would
> have to be rewired to support two serial ports on the LX200. Although
> the modification would not be difficult, it is definitely not "plug and
> play"...
>
> Since these adapters are intended for phone lines, they typically only
> contain four conductors. The center pair is Line 1, the next pair
> "outward" is Line 2. Five conductors are required for two serial ports
> sharing a common ground.
>
> Also, on the LX200, the second serial port requires the use of the pin
> on the extreme right (opposite side from the B+ pin). As a result, the
> easiest way to implement dual serial ports is to use a six-conductor
> cable plugged into the LX200 RS232 port and to split the cable at the
> "computer" end for two DB-9's (sorry, my PC bias is showing...).
>
> - Wes

I have followed this thread from a distance. But must, in good
conscience, interject here that you are entirely correct.

It is very important to NOT get the power pin (+12 to 18 volts)
connected to anything else.

Doc G

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