Installation manual

Fast EtherHub-8se User’s Guide
Hardware Reference 4-3
Speech Status
Color: Orange
Label:
Speech
Function: Talking function indicator
Condition Indication
ON Talking function is enabled.
OFF Talking function is disabled.
Statistical Display for System Performance
Utilization - (Utilization%) The statistical indicators show the percentage of valid data
passing through all ports compared to overall network bandwidth (updated every
0.5 seconds). There are 5 LEDs representing the percentage of network utilization.
The corresponding LEDs light up to show that the utilization of LAN bandwidth
has reached this level. When active, these LEDs behave like a stereo’s equalizer
display.
For example, if network utilization reaches 1%, the LED labeled 1% will light up.
However, if network utilization rises above 1% (e.g., 30%), the LED labeled 30
and all the other LEDs before it (i.e., 1, 5 and 15) will also light up in rapid
succession. These indicators monitor the share of valid network frames handled
by the hub within a 100 Mbps bandwidth. They provide a quick way to monitor
the current traffic load relative to the network’s capacity.
Collision - (Collision%) The statistical indicators show the percentage of packet
collisions occurring out of the total packets transmitted by the hub. Collisions
occur when two or more devices connected to a hub attempt to transmit data
simultaneously on the network. When a collision occurs, devices pause and then
re-transmit after a pseudo-random wait period. Because wait periods differ among
devices, successive collisions become increasingly improbable.