null
IBM

IBM 73G9721 EtherJet 10BASE-T ISA Network Adapter Card EtherStreamer 73G9378

(No reviews yet) Write a Review
SKU:
13729
MPN:
73G9721
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
2.00 LBS
Shipping:
Calculated at Checkout
  • IBM 73G9721 EtherJet 10BASE-T 16-bit ISA network adapter card – angled top view showing green PCB, ISA edge connector, and RJ-45 port on bracket
  • IBM EtherJet 10BASE-T ISA Adapter label close-up showing EtherStreamer controller chip markings and board components
  • IBM 73G9721 ISA Ethernet card – solder-side (back) view showing bare PCB and ISA edge connector
  • IBM 73G9721 label close-up showing FRU-73G9721, secondary part number 73G9378, FCC ID ANO73G9379, and date code 9645
$18.00
Was: $40.00
Current Stock: 94

Sold Out

Description

IBM 73G9721 EtherJet 10BASE-T ISA Network Adapter Card EtherStreamer 73G9378

This is a 10 Mbps Ethernet network adapter card for ISA-bus computers. It provides network connectivity via RJ-45 connection using the 10BASE-T standard.

Specifications & What's Included

  • Model: IBM 73G9721 / Secondary Model 73G9378
  • Network Standard: 10BASE-T (10 Mbps Ethernet)
  • Bus Type: ISA (16-bit)
  • Connector: RJ-45
  • Chipset: EtherStreamer (3Com/IBM)
  • Form Factor: Full-Height ISA Card
  • Manufactured: United States
  • Card only; no drivers disk or documentation included

Applications

This adapter card was used in IBM PC and PS/2 systems, as well as other ISA-bus compatible desktop computers from the 1980s and 1990s. It provides basic network connectivity for legacy systems requiring 10BASE-T Ethernet. Typical applications include connecting older workstations to corporate networks or local area networks where 10 Mbps bandwidth was sufficient. This card type is now primarily used in vintage computing restoration or museum exhibits.

Condition: Used
This IBM 73G9721 EtherJet 10BASE-T ISA Network Adapter Card has been inspected and shows typical light wear consistent with normal prior use. The PCB is clean and intact with no visible damage, broken traces, or missing components. The bracket and RJ-45 port appear in good physical shape. No drivers disk or documentation is included — card only. 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.
View AllClose

Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
View AllClose

Additional Information

Brand:
IBM
Model:
73G9721
MPN:
73G9721
Secondary Model:
73G9378
FRU:
FRU-73G9721
Type:
Ethernet Network Adapter Card
SKU:
13729
Network Standard:
10BASE-T (10 Mbps Ethernet)
Bus Type:
ISA (16-bit)
Form Factor:
ISA Card / Full-Height Bracket
Connector Type:
RJ-45
Network Chipset:
EtherStreamer (3Com/IBM)
Data Rate:
10 Mbps
FCC ID:
ANO73G9379
Condition:
Used – Inspected
Country/Region of Manufacture:
United States
Compatible With:
IBM PC, IBM PS/2, and ISA-bus compatible desktop PCs
Seller Notes:
Card only. No drivers disk or documentation included.
Condition Notes:
IBM 73G9721 EtherJet 10BASE-T ISA Ethernet card. Inspected; PCB clean, no visible damage. Light wear from prior use. Card only — no drivers or docs included. Please contact us with any questions.
View AllClose

Related Products

Related Products

IBM 63H2449 SB0110440 Printer Ethernet Card – top view showing PCB with VLSI and HALO TNT chips IBM 63H2449 Printer Ethernet Card – PCB reverse side showing DEC 4V0 marking and board traces
Add to Cart
Quick view

IBM 63H2449 Printer Ethernet Card 10Base-T 10Base2 SB0110440 Network Adapter

IBM

$30.00
Was: $120.00
IBM 63H2449 Printer Ethernet Card 10Base-T 10Base2 SB0110440 Network AdapterThis is a network interface card designed for IBM printers, providing Ethernet connectivity via two connection standards...
48612
SKU:
48612
Availability:
Usually ships within 1-2 business days.
Weight:
3.00 LBS
Brand:
IBM
Model:
63H2449
MPN:
63H2449
Secondary Model:
SB0110440
Type:
Printer Ethernet Network Interface Card
SKU:
48612
Network Standard:
10Base-T, 10Base2
Data Rate:
10 Mbps
Interface Type:
10Base-T (RJ-45), 10Base2 (BNC)
Connector Type:
RJ-45, BNC
Number of Ports:
2 (1x RJ-45, 1x BNC)
Form Factor:
Card / Module
Network Chipset:
VLSI (visible on PCB)
MAC Address:
00-04-AC-9A-88-20
Board Assembly:
SB0110440
Compatible With:
IBM Printers (FRU replacement card)
Country/Region of Manufacture:
Puerto Rico
Condition:
Used – Pulled from Working Environment
Seller Notes:
Card only. Pulled from a working environment. P/N 63H2449, Assy SB0110440.
Condition Notes:
IBM 63H2449 Printer Ethernet Card (SB0110440) inspected and in good used condition. Pulled from a working environment. Normal wear from prior use. RJ-45 and BNC connectors intact.
Kingston KNE2021LC ISA Ethernet card — front component side showing Kingston EtherRx controller chip, BNC and RJ45 connectors on bracket, ISA edge connector Kingston KNE2021LC ISA Ethernet card — solder side showing PCB traces, board revision label 0029215-002 A01, and MAC address 00 C0 F0 00 C8 37
Add to Cart
Quick view

Kingston KNE2021LC ISA Ethernet Network Card BNC Coax RJ45 10Base-T 10Base-2

Kingston

$28.00
Was: $60.00
Kingston KNE2021LC ISA Ethernet Network Card BNC Coax RJ45 10Base-T 10Base-216-bit ISA network interface card for legacy PCs. Supports both 10Base-T (twisted pair via RJ45) and 10Base-2 (coaxial via...
44312
SKU:
44312
Availability:
Usually ships within 1-2 business days.
Weight:
1.00 LBS
Brand:
Kingston
Model:
KNE2021LC
MPN:
KNE2021LC
Secondary Model:
2976047501
Type:
ISA Ethernet Network Interface Card (NIC)
SKU:
44312
Condition:
Used – Pulled from Working Environment
Seller Notes:
Card only; pulled from working environment. No software included.
Country/Region of Manufacture:
Taiwan / Hong Kong
Form Factor:
ISA (Industry Standard Architecture)
Interface Type:
ISA 16-bit
Connector Type:
BNC (10Base-2) and RJ45 (10Base-T)
Network Standard:
10Base-T, 10Base-2 (Ethernet)
Data Rate:
10 Mbps
Number of Ports:
2 (1x BNC, 1x RJ45)
Chipset:
Kingston EtherRx (visible on main IC)
Compatible With:
ISA-bus PCs: AT, 286, 386, 486, Pentium-era
Compatible With 2:
10Base-T hubs/switches and 10Base-2 coax segments
Power Requirements:
+12VDC, +9VDC (from ISA bus)
LED Indicators:
Link, Act (green LEDs on bracket)
Condition Notes:
Kingston KNE2021LC ISA Ethernet NIC inspected and in good used condition. Pulled from a working environment. PCB clean, BNC and RJ45 connectors intact, bracket shows minor scuffing. Please contact us with any questions.