Description
IBM 16/4 Token Ring ISA Card 92F4554A 2906042PQ Short ISA K1 M830
The IBM 92F4554A is a 16/4 Mbps Token Ring network adapter in a short ISA form factor. It connects a PC or workstation to an IBM Token Ring LAN via a DB-9 connector and operates at either 4 Mbps or 16 Mbps ring speeds. The card carries IBM part number 2906042PQ and board identifier K1 M830, and is FCC Class A certified.
Specifications & What's Included
- Manufacturer: IBM
- Model / Part Number: 92F4554A
- Secondary Part Number: 2906042PQ
- Board ID: K1 M830
- Network Standard: Token Ring, 4 Mbps / 16 Mbps
- Bus Interface: ISA (Industry Standard Architecture)
- Form Factor: Short ISA card
- Bracket Connector: DB-9 (9-pin) Token Ring port
- Onboard ICs: MP212DM 74LS125AM quad bus-buffer logic ICs (multiple, visible on PCB)
- FCC Classification: Class A
- Included: Card only — no driver diskettes, software, or documentation
Applications
IBM Token Ring was IBM's proprietary LAN technology introduced in the mid-1980s as an alternative to Ethernet. Rather than the collision-based access method Ethernet uses, Token Ring passed a control token around the ring to regulate which station could transmit — a deterministic approach that made it popular in environments requiring predictable, low-latency network performance. The 16/4 designation means the card supports both the original 4 Mbps ring speed and the faster 16 Mbps standard introduced later. ISA-bus Token Ring adapters like the 92F4554A were used in IBM PS/2 systems, IBM-compatible PCs, and AT-bus workstations connected to IBM mainframe and midrange environments throughout the late 1980s and 1990s, including AS/400 and System/36 shop-floor and office networks. By the late 1990s, Ethernet had largely displaced Token Ring in new installations, but many IBM-centric data centers continued running Token Ring infrastructure well into the 2000s. Today these cards are sought by collectors, vintage computing enthusiasts, and sites still maintaining legacy IBM LAN environments.
This IBM 16/4 Token Ring ISA Card (92F4554A / 2906042PQ) has been inspected and appears to be in good used condition. The PCB is clean with no cracked traces, bent pins, or obvious physical damage visible. The DB-9 bracket connector looks intact. Normal light handling marks are present consistent with prior installation and removal. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
IBM |
Model: |
92F4554A |
Secondary Model: |
K1 M830 |
MPN: |
2906042PQ |
SKU: |
47365 |
Type: |
Token Ring ISA Network Adapter Card |
Network Standard: |
Token Ring 16/4 Mbps |
Bus Type: |
ISA |
Form Factor: |
Short ISA Card |
Data Rate: |
4 Mbps / 16 Mbps |
Connector Type: |
DB-9 (9-pin) |
FCC Class: |
Class A |
Compatible With: |
IBM PS/2, PS/1, PC/AT, ISA-bus desktop systems |
Condition: |
Used – Inspected and in Good Condition |
Country/Region of Manufacture: |
United States |
Seller Notes: |
Card only; no software or documentation included. |
Condition Notes: |
IBM 92F4554A 16/4 Token Ring ISA Card inspected and in good used condition. PCB is clean, DB-9 connector intact, no visible damage. Card only — no software included. |
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 |
