Apple Token Ring Products Service Manual
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Service Source
Token Ring Products
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Service Source
Specifications
Token Ring Products
Specifications Token Ring 4/16 NB Card - 1
Token Ring 4/16 NB Card
Interface
Processor
Memory
Data T ransfer Speed
Power Requirements
External Connector
NuBus (bus master)
Motorola 68000 microprocessor operating at 10 MHz
512K of RAM, expandable to 2.5 MB
4 or 16 Mbps
1.5 A at 5 V
DE-9 (IBM Type 1 cable)
External adapters for Type 3 cable from third party
Specifications Token Ring 4/16 NB Card - 2
Chip Set
Application Programming Interface
LLC
Routing
Token Ring Address
Timers
IBM Token Ring
AppleTalk, Apple 3270 API, APPC verb interface
Type 1 and Type 2
Supports IBM source routing
Burned-in or locally administered
Response (T1), Acknowledge (T2), and Inactivity (Ti)
Specifications Token Ring 4/16 NB Card - 3
Other
Cable
Shielded twistedpair:
Unshielded twistedpair:
Approvals
Card settings can be password-protected
Maximum distance from MAU to device (lobe length) = 300
meters
Maximum distance between two MAUs (trunk length) = 200
meters
Maximum devices per ring = 260
Maximum distance from MAU to device (lobe length) = 100
meters
Maximum distance between two MAUs (trunk length) = 120
meters
Maximum devices per ring = 72
FCC class A; VDE
Specifications TokenTalk NB Card - 4
TokenTalk NB Card
Interface
Processor
Memory
Data T ransfer Speed
Application Programming Interface
NuBus (bus master)
Motorola 68000 microprocessor operating at 10 MHz
512K of RAM
4 Mbps
AppleTalk, Apple 3270 API, APPC verb interface
Specifications TokenTalk NB Card - 5
Power Dissipation
External Connector
15 W
DE-9 (IBM Type 1 cable)
External adapters for Type 3 cable from third party
Specifications Token Ring NB/c Card - 6
Token Ring NB/c Card
Interface
Memory
ROM
Data T ransfer Speed
Power Requirements
NuBus
64K SRAM, nonexpandable
32K ROM
4 or 16 Mbps, jumper selectable
1.5 A at 5 V
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