Description
Andrew MAU9228 8-Port Token Ring Multistation Access Unit MSAU MAU RI RO IBM
The Andrew MAU9228 is an 8-port Token Ring Multistation Access Unit (MAU, also commonly called an MSAU). It provides eight station connection ports numbered 1–8 plus Ring In (RI) and Ring Out (RO) ports, and is the central wiring hub of a Token Ring network segment. The unit powers on with the red POWER LED illuminating; Token Ring functionality was not further verified.
Specifications & What's Included
- Brand: Andrew
- Model: MAU9228
- Type: Token Ring Multistation Access Unit (MAU / MSAU)
- Station ports: 8 numbered ports (1–8), each with individual status LED
- Ring In (RI) port: 1 — for daisy-chaining multiple MAUs
- Ring Out (RO) port: 1 — for daisy-chaining multiple MAUs
- Total ports: 10 (8 station + RI + RO)
- Port connectors: RJ-45 style (Token Ring UTP)
- Power: AC powered via attached cord; rotary fuse holder on end panel
- Dimensions: 17" × 5.5" × 2"
- Form factor: Desktop / 1U rackmount profile
- Chassis: Beige/cream metal enclosure
- Includes: Unit with attached AC power cord
Applications
Token Ring MAUs like the Andrew MAU9228 were the central wiring concentrators in IBM Token Ring networks — the Token Ring equivalent of an Ethernet hub. Workstations connected to the numbered station ports, and multiple MAUs could be linked in a ring by connecting the RO port of one unit to the RI port of the next, extending the network to more users. Token Ring was IBM's primary LAN standard through the late 1980s and into the 1990s, running at 4 Mbps or 16 Mbps over twisted-pair or IBM Type 1 shielded cabling. It was widely deployed in IBM-centric environments — AS/400 systems, IBM PS/2 workstations, mainframe-connected terminals, and corporate data centers that standardized on IBM networking. Token Ring has been superseded by Ethernet and is no longer deployed in new installations, but MAUs like this are still sought by collectors, retrocomputing enthusiasts, and organizations maintaining legacy IBM systems. The Andrew MAU9228 dates from the late 1980s to early 1990s era of Token Ring's commercial peak.
This Andrew MAU9228 Token Ring Multistation Access Unit has been inspected and is in good cosmetic condition. The unit powers on and the red POWER LED illuminates, confirming it receives power, though we were not able to test Token Ring functionality beyond that. The beige metal chassis shows light shelf wear consistent with its age. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
Andrew |
Model: |
MAU9228 |
MPN: |
MAU9228 |
SKU: |
34532 |
Type: |
Token Ring Multistation Access Unit (MAU/MSAU) |
Number of Ports: |
8 station ports + RI + RO (10 total) |
Port Type: |
RJ-45 (Token Ring) |
Ring In/Ring Out: |
Yes — RI and RO ports for MAU chaining |
Network Technology: |
Token Ring |
Form Factor: |
Desktop / 1U Rackmount |
Dimensions: |
17" x 5.5" x 2" |
Power: |
AC powered — fused rotary fuse holder |
Seller Notes: |
Unit only — includes attached AC power cord |
Compatible With: |
IBM Token Ring networks, AS/400, PS/2, PC |
Country/Region of Manufacture: |
United States |
Condition Notes: |
This Andrew MAU9228 Token Ring MAU has been inspected and is in good cosmetic condition. It powers on and the red POWER LED illuminates; Token Ring functionality was not further tested. Light shelf wear present. |
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 |
