Command Manual – Port Basic Configuration 
Quidway S3900 Series Ethernet Switches-Release 1510 
Chapter 1  Port Basic Configuration
Commands
 
Huawei Technologies Proprietary 
1-33 
z  Pair skew  
z  Pair swap  
z  Pair polarity  
z  Insertion loss 
z  Return loss  
z  Near-end crosstalk  
By default, the system does not test the cable connected to the Ethernet port.  
 
  Note: 
The combo port does not support the virtual-cable-test command. 
 
Example 
# Enable the system to test the cable connected to Ethernet1/0/1.  
<Quidway> system-view 
System View: return to User View with Ctrl+Z. 
[Quidway] interface Ethernet1/0/1 
[Quidway-Ethernet0/1] virtual-cable-test 
Cable status: abnormal(open), 7 metres 
Pair Impedance mismatch: yes 
Pair skew: 4294967294 ns 
Pair swap: swap 
Pair polarity: normal 
Insertion loss: 7 db 
Return loss: 7 db 
Near-end crosstalk: 7 db