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Andrew & I have been communicating via PM to try and establish what is causing the problem.
For anyone following in an attempt to trouble shoot their own connection issues; here was Andrew's response (in Blue) to my latest post:
Gday Carlton
successfully shorted out the tx/rx pins on the serial/usb db9 connector & sent & received :GC# command.
Good, that means the expensive bit works :-)
Carefully prised apart the db9/rj9 adapter & as far as I can tell it is wired as per your photograph.
OK
Retested continuity, this was a bit tricky & I got patchy results. Sometimes I had continuity, sometimes I didn't.
That could be lots of things, but doesnt sound good.
You need solid continuity
I might have another option in purchasing a telephone handset connector which I believe has an rj9 connection standard, then cutting off one end & soldering correct wires to a db9 connector as per your diagram. Would that work?
Thats how i started out, but i had a lot of 4wire flat phone cable and connectors and a crimper. I just crimp a connector on one end then soldered the other to the DB9.
What you could do is see if there is a local phone tech who would make up a short bit of 4 wire flat and one end.
If you dont have a DB9 or supplier nearby, you can always open your Meade adapter and cut the wires close to the RJ11, and then solder the wires , vs solder to a new DB9????
Andrew
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