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IBM 74F8653 1 x Port DB-9 16/4 Token Ring Micro Channel Adapter
- Single DB-9 port for Token Ring network connection
- Supports dual-speed operation: 16 Mbit/s and 4 Mbit/s
- Micro Channel architecture interface
- Designed for IBM PS/2 and compatible systems
- Enables high-speed Token Ring networking
- Provides reliable network connectivity for legacy IBM environments
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Product Overview
The IBM 74F8653 is a Token Ring network adapter featuring a single DB-9 port and supporting speeds of 16/4 Mbit/s. It is designed for the Micro Channel architecture, common in IBM PS/2 systems and servers.
Technical Information
| Port Type | DB-9 |
| Network Type | Token Ring |
| Speed | 16/4 Mbit/s |
Additional Specifications
| Interface | Micro Channel |
| Manufacturer | IBM |
| Part Number | 74F8653 |
Product Description
The IBM 74F8653 is a high-performance Token Ring network adapter engineered for IBM's Micro Channel architecture (MCA). This adapter is capable of operating at both 16 Mbit/s and 4 Mbit/s, offering flexibility and backward compatibility with existing Token Ring networks. The single DB-9 connector is the standard interface for connecting to the Token Ring cabling system, typically using STP (Shielded Twisted Pair) cable. Designed primarily for IBM's PS/2 line of personal computers and compatible servers that featured the Micro Channel bus, this adapter provided a robust and reliable networking solution. Token Ring technology, with its token-passing access method, offered deterministic performance, which was highly valued in business environments where predictable network access was crucial. The dual-speed capability allowed organizations to upgrade their network infrastructure to 16 Mbit/s while still being able to connect to older 4 Mbit/s segments. This specific part number, 74F8653, signifies an adapter that was part of IBM's strategy to provide advanced networking options for its MCA-based systems. It represents a significant step up in performance from earlier 4 Mbit/s-only adapters and was a key component for businesses relying on IBM hardware for their critical network operations during the era of Token Ring dominance.
