Description
US Robotics Sportster 28800 V.34 V.42bis Fax Modem 16-bit ISA Card 33.6K
The US Robotics Sportster 28800 is a 16-bit ISA internal modem card supporting the V.34 standard at 28,800 bps with V.42bis data compression. The card is upgradable to 33.6 Kbps and includes DIP switches on the back bracket for configuration and jumperable settings for IRQ and I/O address selection. It supports both data and Class 1 fax communication over standard analog phone lines.
Specifications & What's Included
- Brand: US Robotics
- Model: Sportster 28800 (MPN: 00084000)
- Form Factor: 16-bit ISA internal card
- Maximum Data Rate: 28,800 bps; upgradable to 33,600 bps (33.6K)
- Standards: V.34, V.42bis data compression, Class 1 Fax
- Configuration: DIP switches on rear bracket panel; jumperable IRQ/I/O
- Connectors: Two RJ-11 ports on bracket (Line and Phone)
- Speaker: On-board speaker for call progress audio (visible on PCB)
- Main DSP controller chip visible on PCB (Rockwell-based architecture)
- ISSI IS62C256-70U SRAM chips (×2 visible on PCB)
- Copyright 1994 on PCB; manufactured in Canada
- FCC ID: CJUSA-65828-FA-L
- Includes: Modem card only — no cables, software, or manual included
Applications
The US Robotics Sportster line was one of the most popular internal modem families of the mid-1990s, widely used in desktop PCs for dial-up internet access, bulletin board system (BBS) connections, and fax transmission. The 16-bit ISA bus interface made it compatible with the vast majority of IBM-compatible PCs of the era — from 286 and 386 machines through Pentium systems that still carried ISA slots. V.34 at 28.8 Kbps represented the practical speed ceiling for analog dial-up during much of the mid-1990s, and the field-upgradable design allowed users to step up to 33.6 Kbps as that standard became available. Today these cards are sought by vintage PC enthusiasts, retro computing hobbyists, and collectors restoring period-correct DOS and early Windows 95/98 systems, as well as anyone maintaining legacy ISA-slot industrial or embedded PCs that still require analog modem capability.
This US Robotics Sportster 28800 V.34 ISA Fax Modem card has been inspected and is in good condition. The PCB is clean with no visible damage, cracked traces, or missing components. The DIP switches on the back panel and the RJ-11 ports appear intact. Normal light handling wear is present consistent with prior installation in a PC. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
US Robotics |
Model: |
Sportster 28800 |
MPN: |
00084000 |
Type: |
Internal Fax Modem Card |
SKU: |
11875 |
Condition: |
Used – Inspected and in Good Condition |
Seller Notes: |
Card only; no cables or software included |
Country/Region of Manufacture: |
Canada |
Form Factor: |
16-bit ISA Card |
Interface Type: |
16-bit ISA Bus |
Data Rate: |
28,800 bps (upgradable to 33,600 bps) |
Standards: |
V.34, V.42bis, Class 1 Fax |
Max Speed: |
33.6 Kbps (after upgrade) |
Connector Type: |
RJ-11 (Line and Phone jacks) |
Configuration: |
DIP switches on back panel; jumperable |
Chipset: |
Rockwell (main DSP controller on PCB) |
Compatible With: |
ISA-equipped PCs, DOS, Windows 3.x, Windows 95 |
FCC ID: |
CJUSA-65828-FA-L |
Copyright Year: |
1994 |
Condition Notes: |
US Robotics Sportster 28800 V.34 ISA Fax Modem card inspected and in good condition. PCB clean, DIP switches and RJ-11 ports intact, light handling wear. Please contact us with any questions. |
