9600 Modem — 16-Bit ISA Card

Extensive engineering and documentation work on an internal 9600-bit/s modem designed to install directly into a personal computer's 16-bit ISA expansion slot.

16-Bit ISAInternal ModemPCB HardwareManufacturing Documentation

Hardware focus

The public portfolio now centers on the actual product Evan worked on: one CompuCom internal modem card with its 16-bit ISA edge connector, telephone-line interfaces, period modem electronics, and computer slot bracket.

Work represented

Substantial engineering and drawing support for the internal modem card.
Documentation of PCB-related mechanical packaging and computer-slot interfaces.
Coordination of the ISA edge connection, rear bracket, telephone jacks, and installed component envelope.
Manufacturing and quality awareness during a rapidly changing low-cost modem market.

Product context

9600-bit/s telecommunications hardware
16-bit ISA personal-computer expansion card
Telephone-line isolation and RJ-11 interfaces
Late-1980s/early-1990s through-hole electronics
PCB, bracket, component, and assembly documentation

Representative product rendering based on Evan's firsthand description. It is not claimed as an archival photograph or exact proprietary PCB layout.

PCB packaging

Connected the circuit-card outline, components, slot connector, rear bracket, and telephone interfaces into a manufacturable assembly.

Documentation

Produced or supported the engineering drawings needed to communicate the modem hardware accurately.

Unbuilt test concept

Evan also proposed testing multiple modems in parallel using command-driven fixtures. That quality-improvement idea remained a concept and is not presented as installed production equipment.

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