Enterasys csx400 Benutzerhandbuch

CSX400 and CSX400-DC User’s Guide

87

Displays the signal level for the physical DI line. Set this to 0 dB unless the 

service provider recommends another setting. The default setting for this field is 0 dB. Click on the 
appropriate radio button for the following levels:

0 (Zero) dB

-7.5 dB

-15 dB

Displays the line coding for the physical DI line. The selections toggle 

between B8ZS and AMI. The default setting for this field is B8ZS.

Network Loopback is a testing procedure that segments the line and allows you 

to isolate faults. The selections for this field toggle between No Loop and Line Loop. In Line Loop 
all 24 channels are looped back to the DI line. The CyberSWITCH must be in Loop-Timing mode 
to use this option. The default setting is No Loop.

Displays the DI Transmit Clock Source. Click on the radio button 

to select either the Loop-Timing (Extracted Line Data) or Local-Timing (Internal Clock) option. 
The default setting for this field is Loop-Timing.

Displays the active protocol for the Wide Area DI interface. The selections for this 

field are Frame Relay and PPP. The default setting for this field is PPP.

If Frame Relay is the selected protocol, this field displays Q.933 

Annex A and T1.617 Annex D. The default for Frame Relay is T1.617 Annex D. This field is 
grayed out and not used for PPP.

Once the Wide Area DI configuration is complete, click on the Next>> button, and go to the 

 or the 

 section, depending on which protocol you are using.