AVS Special Member
Join Date: Nov 2001
Location: Merritt Island FL 32952
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The issue as I see it is that if you are building the cable you are using an RJ 11 Plug, which only has 4 pins! Of that I am sure. The Benq has either a 4 position or a 6 position Modular jack, but that is irrelavent. The cable with the plug is what concerns us.
The pins on the plug are numbered 1,2,3,4, the fact that they will mate to modular jack positions 2,3,4,5 if it is a 6 position MJ, or to pins 1,2,3,4 if it is a 4 position MJ is also irrelavent (assuming that Benq wired the MJ correctly, which they did).
What didn't make sense to me was in the context of building the cable. There is no pin 5 on an RJ11 plug, but pin 4 on an RJ11 plug does mate to a pin 5 on a 6 position modular jack.
Now if we build the cable using the adapter, which probaly has a 6 position modular jack then pin 5 is the right one to wire to pin 5 on the DB9 and the pinout you provided is correct.
I think we both understand the situation.