Description
US Robotics 83133200 28.8K ISA Modem Card DP/N 96385 TELCO PHONE RJ-11 Fax
The US Robotics 83133200 is a 28.8 Kbps dial-up fax modem on an ISA expansion card, identified by Dell part number (DP/N) 96385. It fits into an 8-bit or 16-bit ISA slot and provides two RJ-11 ports — one labeled TELCO for the telephone wall jack and one labeled PHONE for a pass-through handset connection. The card carries a DSP chip, an ICT14B modem controller, and an Omron relay, and includes an onboard speaker for call-progress audio monitoring.
Specifications & What's Included
- Manufacturer: US Robotics
- Model / Part Number: 83133200
- Dell DP/N: 96385 (DP/N 00096385)
- Hardware Revision: Rev. B00
- Data Rate: 28.8 Kbps (28,800 bps)
- Bus Interface: ISA (8-bit edge connector)
- Ports: 2 × RJ-11 — TELCO (line in) and PHONE (handset pass-through)
- Onboard speaker for call-progress audio
- Main controller: ICT14B modem controller IC
- DSP chip present (NEC-branded DSP, markings partially visible)
- Omron relay (G5V-2-H1, 5VDC)
- FCC Registration No.: CJEUSA-65828-FA-E
- FCC ID: C4E-0289; Ringer Equivalence: 0.2B; Load Number: 20
- Industry Canada approved; UL listed
- Country of Manufacture: Mexico
- Card only — no software, drivers, or cables included
Applications
ISA dial-up modem cards like the US Robotics 83133200 were standard PC peripherals through the late 1980s and 1990s, used in desktop computers equipped with ISA bus slots for connecting to telephone lines for dial-up internet access, bulletin board systems (BBS), fax transmission, and remote access. The ISA (Industry Standard Architecture) bus was the dominant PC expansion interface from the IBM PC/AT era through the mid-1990s, when PCI began replacing it in consumer systems. Cards of this type are now primarily sought for legacy system restoration and maintenance — keeping older ISA-bus industrial PCs, point-of-sale systems, or embedded control systems functional — as well as for vintage computing collectors and hobbyists. The two-port RJ-11 design (TELCO + PHONE) allowed the modem to share a single phone line with a handset, a common requirement in small office and home office deployments of the era.
This US Robotics 83133200 28.8K ISA modem card has been inspected and is in good condition. The card shows normal light wear consistent with prior use but no cracks, damage, or missing components. The RJ-11 TELCO and PHONE ports and ISA edge connector appear clean and intact. 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: |
83133200 |
MPN: |
83133200 |
Secondary Model: |
DP/N 96385 |
SKU: |
43312 |
Type: |
ISA Dial-Up Fax Modem Card |
Data Rate: |
28.8 Kbps (28800 bps) |
Interface Type: |
ISA (8-bit) |
Connector Type: |
RJ-11 (TELCO and PHONE) |
Number of Ports: |
2 (TELCO, PHONE) |
Form Factor: |
ISA Expansion Card |
Hardware Revision: |
Rev. B00 |
FCC Registration No.: |
CJEUSA-65828-FA-E |
FCC ID: |
C4E-0289 |
Ringer Equivalence: |
0.2B |
Load Number: |
20 |
Condition: |
Used – Inspected and in Good Condition |
Country/Region of Manufacture: |
Mexico |
Seller Notes: |
Card only; no software or cables included. |
Compatible With: |
ISA-bus desktop PCs (8-bit and 16-bit ISA slots) |
Condition Notes: |
US Robotics 83133200 28.8K ISA modem card. Inspected and in good condition. Normal light wear; no cracks or damage. RJ-11 ports and ISA edge connector clean and intact. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
