Cabletron Systems Cabletron CyberSWITCH CSX400 - Manual (Page 101)

CSX400 Configuration with QuickSET
CSX400 and CSX400-DC User’s Guide 87
T1 Line BuildOut — 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
T1 Line Coding — Displays the line coding for the physical DI line. The selections toggle
between B8ZS and AMI. The default setting for this field is B8ZS.
T1 Loop-Back — 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.
T1 Transmit Clock Source — 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.
Protocol — 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.
Link Management Protocol — 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 Wide
Area Frame Relay Time Slot Configuration Window or the Wide Area PPP Time Slot
Configuration Window section, depending on which protocol you are using.