laughs! I didn’t mean to say it was something was obscure, just you mentioned 2600 first and I wondered if you were referring to something they’d written about as a cabling trick. Regards to your work experience, too!
Interesting - I’d never heard that! Tip and Ring are the basis of TRS connections for audio. (Tip Ring Sleeve) - A basic insert cable is a TRS connector that Y’s out into two separate cables, one for Tip and the other for Ring. Usually the TRS is for a stereo signal whereas a mono cable is just TS, Tip and Sleeve. Since telephone wires are monophonic, I’d presume they’d be TS, not TR. Fun to think about.
