Everex Systems EV-923 Internal Modem ISA Card 1987 Vintage PC RJ11C FCC

Everex Systems EV-923 Internal Modem ISA Card 1987 Vintage PC RJ11C FCC

The Everex Systems EV-923 is a vintage internal modem on a half-height ISA expansion card, manufactured in 1987. It installs into an 8-bit ISA slot in an IBM PC, XT, AT, or compatible desktop computer and provides dial-up telephone connectivity through two RJ11C phone jacks mounted on the card bracket. The board is marked Rev C and carries a Parcorp FCC compliance label along with the Everex Systems FCC Part 68 registration label. The card was made in the USA.

Specifications & What's Included

• Manufacturer: Everex Systems, Inc.
• Model: EV-923
• Revision: Rev C (silkscreened on PCB)
• Interface / Bus: ISA (8-bit), half-height form factor
• Phone Connectors: 2 × RJ11C jacks on bracket (line and phone)
• DIP Switch Block: 4-position DIP switch on bracket for configuration
• FCC Registration Number: E3E5UV-72212-MD-E
• Ringer Equivalence: 0.7B
• Standards: FCC Part 15 Class B; FCC Part 68
• Country of Manufacture: United States
• Year: 1987
• Included: Card only — no software, drivers, or documentation

Applications

The EV-923 is an internal dial-up modem designed for IBM PC/XT/AT-compatible desktop computers of the mid-to-late 1980s. Cards like this were used to connect personal computers to telephone lines for dial-up data communication — enabling bulletin board system (BBS) access, early online services, file transfer, and remote terminal sessions at speeds typical of late-1980s modem technology. Everex Systems was a prominent PC peripheral and clone maker of that era, and the EV-923 was representative of the integrated internal modem cards that competed with external serial-port modems of the time. Today these cards are primarily of interest to vintage PC enthusiasts, collectors restoring period-correct IBM PC/XT/AT systems, and hobbyists running original DOS-era BBS or communication software on hardware of the same generation.