Digiboard, fits full length ISA slot in your computer. This is approx 15" long. Provides 8 serial ports, but the cable on this one only has 4 connections so 4 serial ports.
Info: fcc id fjs46w70198 pn 55000178.8 port with 4 port cable.
Looks like this one:Email to ohb at bellsouth dot net.