Oddball IBM 8bit card find.

Hi anyone can ID this card? Was pulled from a XT pc machine. Ok, The FPU # is: FPU P/N 33F4846 other label: P/N 57F1590 A26 6290 other small lonely label: A40167 The big PGA ceramic with gold square cover printed on: L1A0511 6298386 IBM CORP. 84 CAC 8452 Only 40 pin IC is TI: TMS32010NL there more info on it but not needed to list: At end of the card where it is against the front end chassis has 8 24 pin DIP ceramic made by toshiba says: TMM2018D-55 There is other 2 chips same but it's rated -45. I know they're memory type but what is it? Half of the chips on it is mostly analog types and much number of capacitors and SIP resistors and two transformers, 3 relays; 2 are single pole and one is double pole type. Ok looking at bracket from back as normally installed into PC: Starting from top: First 2 connectors are RJ45 type with 8 contacts. Bottom one is different from that 2 it's 6 contact type with 2 in centre replaced by a nub otherwise it's equivlent to RJ45 type but needs a special connector that fits this type of connector with this little nub. Ok, there are empty small holes behind them there are 2 groups of 3 solder holes. I do not know what it would be used. That is sure sign of some kind of jack plugs. This card is in fine condition. Thanks! Jason D.