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I used to own an "eight-inch coupler" (sounds rude). It was a short piece of cable, joining two 25-pin female RS232 connectors. Back when I acquired it, there

I used to own an "eight-inch coupler" (sounds rude). It was a short piece of cable, joining two 25-pin female RS232 connectors. Back when I acquired it, there were lots of computers, terminals and modems that used 25-pin RS232. You could use this thing to replace two modems and a telephone link. It was a handy thing to have in your bag on a field visit.

neilv 3y ago
Null modem? For temporary use, you could also get those in a little adapter, and pair it with a normal DB25-to-DB25 cable with all pins straight through, for more flexibility (without carrying 2 cables).