TL;DR: A 10GBASE-T RJ45 jack is the same 8P8C socket (母座) as Gigabit, but qualified far harder. At 10G the cable must be Cat6A, and alien crosstalk — not internal NEXT — is what limits you.
The essentials:
- Standard: IEEE 802.3an-2006. 10 Gbit/s, 4 pairs, PAM-16 / DSQ128 + LDPC + THP, ~800 Msym/s → energy to ~400 MHz.
- Cabling: Cat6A for the full 100 m (500 MHz, ANSI/TIA-568.2-D). Plain Cat6 ≈ 37–55 m (TIA TSB-155-A).
- The wall = alien crosstalk (ANEXT): the receiver cancels echo + internal NEXT/FEXT, but it can't see the next cable/port. Hence Cat6A + shielded RJ45 to IEC 60603-7-81.
- The jack must: hold return loss/NEXT to ~400 MHz; bond the shield 360° to chassis; keep the 1CT:1CT isolation (VOOHU magjacks: 350 µH min OCL, 2250 VDC hi-pot).
- Don't: reuse a Gigabit-only magjack at 10G, float the shield, or expect 100 m of 10G on Cat6.
VOOHU makes 10G RJ45 sockets (shielded/UTP, SMT/DIP, 1×1→2×8, tab up/down, PoE to 4PPoE).
Full write-up: https://voohuelectronic-ux.github.io/voohu-rj45-guide/resources/10gbase-t-rj45-jack-design.html
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