INTRODUCTION
An AUI cable, up to 50 meters long, is used to connect an Ethernet device to the AUI port on the transceiver. The AUI cable must meet specifications for either IEEE 802.3 or Ethernet Version 1 or Version 2.
Signal Quality Error (SQE) Test
The FOT-F3 has a Signal Quality Error (SQE) Test Enable Switch that allows you to enable or disable the SQE (“heartbeat”) test function. The SQE test allows the transceiver to generate a signal to ensure that the collision circuit and path are operational between the FOT-F3 and the Ethernet device attached to the transceiver’s AUI port. The SQE test signal is generated after the FOT-F3 has transmitted a data packet. This signal is generated only between the FOT-F3 and the device; it will not be transmitted onto the network. The SQE Test must not be used when the FOT-F3 is attached to a repeater or Ethernet Version 1 equipment.
LANVIEW LEDs
The FOT-F3 incorporates Cabletron Systems’ LANVIEW® diagnostic and monitoring system. LANVIEW is a series of LEDs incorporated into all Cabletron Systems’ products. If a problem arises, troubleshooting of power failures, collisions, cable faults, or many other problems can be diagnosed rapidly using a series of LEDs.