Cabletron Systems Cabletron CyberSWITCH CSX400 - Manual (Page 96)

CSX400 Configuration with QuickSET
82 CSX400 and CSX400-DC User’s Guide
T1 Loop-Back — Network Loopback is a testing procedure that segments the line and allows you
to isolate faults. The selections for this field are No Loop and Line Loop. In Line Loop all 24
channels are looped back to the T1 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 T1 Transmit Clock Source. The choices for this field
are Loop-Timing (Extracted Line Data) and Local-Timing (Internal Clock). The default setting for
this field is Loop-Timing.
Protocol — Displays the active protocol for the Wide Area T1 interface. The selections for this
field are either Frame Relay or Point-to-Point (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 T1 configuration is complete, click on Next>>, and go to the Wide Area
Frame Relay Time Slot Configuration Window or Wide Area PPP Time Slot Configuration
Window section, depending on which protocol you are using.