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MACIRMATRAC

DIGITAL COMMUNICATIONS ASSOCIATES, INC.

MACIRMATRAC

NIC Type

Token Ring

Transfer Rate

4/16Mbps

Data Bus

Apple NuBus

Topology

Token ring

Wiring Type

Unshielded twisted pair

Shielded twisted pair via DB9

Fiber optic cable

Boot ROM

Available

CONNECTIONS

Function

Location

Ring Interface Module

CN1

CONNECTIONS

Function

Location

Mother card

CN1

CABLE TYPE

Type

JP1A

JP1B

JP2A

JP2B

Shielded twisted pair

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Unshielded twisted pair

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CONNECTIONS

Function

Location

Mother card

CN1

CABLE TYPE

Type

JP1

Shielded twisted pair

Pins 1 & 2 closed

Unshielded twisted pair

Pins 2 & 3 closed

MISCELLANEOUS NOTES

There are three other ring interface modules available: fiber optic, 4Mbps STP only software configurable, and 4/16Mbps STP only software configurable. These additional modules have no hardware configurable options, and are therefore not illustrated. Connections between the ring interface module and the mother card are identical for every version of module.