Siemens DataNET Hub (DNH) 사용자 설명서

•  Data Communications Setup 

Continued

 

There are four Ethernet Link Status LEDs.  

Link Active  

LED is Green (on) when a link is established success-
fully between the Ethernet port and associated Ethernet 
Hub or repeater.  

If LED is OFF check for a bad cable, faulty wiring, or 
loose connections. 

Rx 

Rx LED blinks when there is data reception on the 
Ethernet port. 

Tx 

Tx LED blinks when the Ethernet port transmits a mes-
sage. 

Collision 

Collision LED blinks when there is a collision on the 
Ethernet link. A collision is a normal event on an 
Ethernet link and occurs when both sides of the link 
attempt to transmit at the same time. Excessive colli-
sions indicate a problem with the network.  

Could be a cabling problem or bad network interface 
board. 

 

The cross link status LED is red when no link is established between the 
two DataNET Hub halves, and is green when a connection is detected. 
Usually a red indication is caused by the absence of the cross link cable 
or a faulty connection.