Nice Z8 with accompanying EPROM (2764 so 8KiB) on the original modem's PCB. Edit: There's also an S35212, which Google tells me is an "active filter for teleco

Nice Z8 with accompanying EPROM (2764 so 8KiB) on the original modem's PCB. Edit: There's also an S35212, which Google tells me is an "active filter for telecommuniations".