| ▲ | chillingeffect 5 days ago | |
Plus the differential versions of most of those signals for long distance doubles the number of pins. And they have optional synchronous clocks. I did some WAN work for 3Com back in the day... :) | ||
| ▲ | cestith 14 hours ago | parent [-] | |
A few devices back in the day could be powered over DB-25 connections besides the communications, even. Some in factories might still be. | ||