MAK, I dare ya to punch down that Jack. I dare ya.
Reality is that the entire data world and the voice/data installer world both use "RJ45" generically to describe any 8P8C plug or jack. It's been that way for almost three decades. You might still be able to use technically correct terminology within the voice side of a telco, but anywhere else in the world it isn't worth the blank-stare confusion, even for an idealist like me. 8P8C = "RJ45". Just deal with it.
The funny thing to me is that the true RJ45 for high-speed modems (9600 bps synchronous! Woo!) used a plug/jack with an extra keyway in the plastic molds. It isn't compatible with what we now call "RJ45" but really came from RJ48 as used for later T1 and ISDN. Language evolution is weird.
ty, RJ61 is obsolete, even for voice-only wiring. For new work, always use EIA/TIA-568-B. I suggest the T568B variant, just because it's already the most popular and so is less likely to confuse the next installer (who could be you). However, if it's a fed contract, you're required to use T568A. It really doesn't matter as long as you're consistent end-to-end.
(BTW, T568A and T568B are the wiring standards within EIA/TIA-568. The current revision is EIA/TIA-568-B. The previous revision was EIA/TIA-568-A, now obsolete. With mixed terminology like this, they wonder why people get confused?)
nyerinfl, new telco terminations use 110-blocks now too, and have for a while. If your local carrier is still installing 66-blocks, their procedures are fossilized. There's a huge number of existing 66-blocks to deal with, of course.