Logicode 28HSVDP 16-Bit ISA Internal Fax Modem Card 28.8Kbps Audio Rev C

Logicode 28HSVDP 16-Bit ISA Internal Fax Modem Card 28.8Kbps Audio Rev C

The Logicode 28HSVDP is a 16-bit ISA internal fax modem card operating at up to 28,800 bps (V.34). It features onboard audio ports — a combination of fax/data modem and audio I/O on a single half-length ISA card. Marked Rev. C and dated 1995 by LTI (Logicode Technology Inc.), this card is a product of the mid-1990s ISA modem era before PCI bus modems took over.

Specifications & What's Included

• Model: Logicode 28HSVDP, Rev. C
• Manufacturer: Logicode Technology Inc. (LTI), © 1995
• Bus Interface: 16-bit ISA
• Form Factor: Half-length ISA expansion card
• Data Rate: Up to 28,800 bps (28.8 Kbps)
• Fax Rate: Up to 14,400 bps (V.17)
• Onboard Datatronics modem DAA module (visible on PCB)
• Main controller ICs: dual Yamaha-marked chips visible on PCB
• Audio ports: 3.5mm audio in/out jacks on bracket
• Phone interface: RJ-11 jack on bracket
• Bracket: standard full-height ISA bracket installed
• Included: card only — no drivers, software, or manual

Applications

The 28HSVDP belongs to the mid-1990s generation of combo modem/audio ISA cards designed for desktop PCs running MS-DOS or Windows 3.x/95/98 with a 16-bit ISA slot. These cards let a single slot handle both dial-up modem duties — fax send/receive, data calls, and BBS access — and basic audio playback/recording, making them a practical all-in-one solution for the era's multimedia-capable PCs. The 28.8 Kbps V.34 standard was the dominant dial-up speed of the mid-1990s before 56K modems arrived in 1996–1997. Today these cards are sought by vintage PC enthusiasts restoring period-correct 486 and early Pentium systems, as well as hobbyists running legacy BBS software or DOS communications applications that require genuine hardware modems rather than software/Winmodem implementations.