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K Service Source Token Ring Products K Service Source Specifications Token Ring Products Specifications Token Ring 4/16 NB Card - 1 Token Ring 4/16 NB Card Interface NuBus (bus master) Processor Motorola 68000 microprocessor operating at 10 MHz Memory 512K of RAM, expandable to 2.5 MB Data Transfer Speed 4 or 16 Mbps Power Requirements 1.5 A at 5 V External Connector 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 IBM Token Ring Application Programming Interface AppleTalk, Apple 3270 API, APPC verb interface LLC Type 1 and Type 2 Routing Supports IBM source routing Token Ring Address Burned-in or locally administered Timers Response (T1), Acknowledge (T2), and Inactivity (Ti) Specifications Token Ring 4/16 NB Card - 3 Other Card settings can be password-protected Cable Shielded twisted- Maximum distance from MAU to device (lobe length) = 300 pair: meters Maximum distance between two MAUs (trunk length) = 200 meters Maximum devices per ring = 260 Unshielded twisted- Maximum distance from MAU to device (lobe length) = 100 pair: meters Maximum distance between two MAUs (trunk length) = 120 meters Maximum devices per ring = 72 Approvals FCC class A; VDE Specifications TokenTalk NB Card - 4 TokenTalk NB Card Interface NuBus (bus master) Processor Motorola 68000 microprocessor operating at 10 MHz Memory 512K of RAM Data Transfer Speed 4 Mbps Application Programming Interface AppleTalk, Apple 3270 API, APPC verb interface Specifications TokenTalk NB Card - 5 Power Dissipation 15 W External Connector 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 NuBus Memory 64K SRAM, nonexpandable ROM 32K ROM Data Transfer Speed 4 or 16 Mbps, jumper selectable Power Requirements 1.5 A at 5 V Specifications Token Ring NB/c Card - 7 External Connector DE-9 (IBM Type 1 cable); 4 or 16 MB