GarrettCom H80P Manual De Usuario

Magnum H80B and H80P Personal Hubs User Guide (07/95)

GARRETT

4.0

OPERATION

This section details the various operational features of

Magnum Personal Hubs, including a description of the LED

indicators. All Personal Hubs are fully compliant with the Ethernet

Version 2/IEEE 802.3 Repeater Specification for CSMA/CD 10

Mbps operation and will function accordingly.

4.1

Functional Operation, Use of LED Indicators

Power On (PWR) LED: Illuminates GREEN to show functional

DC power.

Link Status (LINK) LED (per port): Illuminates GREEN when

there is proper connectivity on the port's 10BASE-T network

segment. Each LINK LED will turn off independently in the event

that connectivity is lost between the ends of that segment or a loss of

power occurs in the segment at either end.

Note: When the switchable port is wired for up-link to another

hub, the LINK LED will normally be on when the up-link
switch is set to the X position. With the up-link switch off
(= position), the LINK LED is off as the up-link is
disabled. This permits local operation of the Personal
Hub with full bandwidth.

Receive Packets (RX) LED (per port): Illuminates GREEN

intermittently to indicate that data is being received from the

segment. This provides a visual indication of network activity for re-

assurance of normal operation, and is helpful in troubleshooting.

Partitioning and Re-connection: Personal Hubs will automatically

partition any port where 32 consecutive collisions occur or after 6.5

ms of continuous transmissions. Network integrity is checked every

800 ms and segment re-connection occurs after one 512-bit packet is

transmitted without an error.