TOPIC
This article gives technical specifications for the Apple Token Ring 4/16 NB Card.
DISCUSSION Hardware * Chip set: IBM Token Ring * Connector: DB-9 connector for attaching to IBM Type 1 cabling. External adapters for Type 3 cabling are available from other vendors * Processor: Motorola 68000 running at 10 Mhz * Bus interface: 9-inch NuBus bus master * Memory: 512K RAM, expandable to 2.5MB * Power requirements: 1.5 amps at 5 volts * Certification: FCC Class A; VDE * Expansion memory: When increasing memory on the card, the following specifications must be met: * Type: Dynamic RAM * Size: 256K x 4 (for expanding to 1MB) or 1MB x 4 (for expanding to 2.5MB) * Configuration: 4 bits wide * Package: ZIP * Speed: 120 ns or faster To expand the Token Ring 4/16 NB Card memory to 1MB, order the Macintosh Coprocessor Platform Memory Expansion Kit. To expand the Token Ring 4/16 NB Card memory to 2.5MB, contact: * Andrew Corporation in Austin, TX. Telephone number is 512-314-3000 Software * Application interface: AppleTalk, Apple 3270 API, APPC verb interface * LLC implementation: Type 1 and Type 2 * Routing: Supports IBM source routing Software-Configurable Card Settings * Transmission speed: 4 or 16 megabits per second * Token Ring address: burned-in or locally administered address * Timers: Response (T1), Acknowledge (T2), and Inactivity (Ti) * Card settings can be password-protected Token Ring Cabling Specifications * Shielded twisted-pair (IBM Type 1 cabling) * Maximum distance from multistation access unit (MAU) to device (lobe length) = 300 meters * Maximum distance between two MAUs (trunk length) = 200 meters * Maximum devices per ring = 260 * Unshielded twisted-pair (IBM Type 3 cabling) * Maximum distance from MAU to device (lobe length) = 100 meters * Maximum distance between two MAUs (trunk length) = 120 meters * Maximum devices per ring = 72 The following Tech Info Library article can help you search for a particular vendor's address and phone number: Article 17159: " Locating Vendor Information " |
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| Document Information | |
| Product Area: | Computers |
| Category: | Cards |
| Sub Category: | Networking Cards |
| Keywords: | SPECSHT |
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