I'm busy reverse engineering a Apple Super Serial Card from the 1981 and come across a component which I haven't been able to find any information on.
Google doesn't find any information on the part and I can only guess looking at the schematic.
Part: 600-0008-A
A 16 pin square block. The silkscreen on the PCB says modem terminal but I don't think that references the component.
I've attached a picture of the component as well as the schematic.
The 1488/1488 are quad line drivers/receivers.
My best guess is the component is some kind of inductor/coil to reduce noise, but then am wondering why pin 13 and 14 is connected in parallel if it's just a straight through coil?
It's connected to J1 which then connects to a DB25 connector for serial comms to a Apple II.
Anyone recognise this and know what's it's function is, and what modern day equivalent it can be replaced with.
Unfortunately I'm working from the schematic/photo's so can't do any continuity testing.