I seem to recall that USRobotics Total Control (dialup servers, ISDN PRI E1 (E1 for me in EU) / T1) to ~30ish dialup lines/ISDN BRI used x86 in the form of 8038

I seem to recall that USRobotics Total Control (dialup servers, ISDN PRI E1 (E1 for me in EU) / T1) to ~30ish dialup lines/ISDN BRI used x86 in the form of 80386ex (386 without real mode). Whether it was 386ex or just a 386 is a bit hazy as it has been 25+ years since i last opened one up. I think each line card that supported analog modems up to 4x 56kbit per card had one, along with some DSPs. Also old Lucent WaveLAN (802.11 era, possibly even the non-standard predecessor) access points had a x86 processor sbc in them.