Cambium PTP 670 Series, Руководство пользователя

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Chapter 8: Troubleshooting Testing a TDM link
Page 8-19
Performing a TDM loopback test
The loopback test allows a TDM data stream to be looped back at the copper or wireless
interface. A typical T1 or E1 installation test includes a copper loopback on the local unit
followed by a wireless loopback on the remote unit.
Note
The TDM Configuration page is only available when the TDM interface is enabled and
the unit is rebooted (
Interface Configuration page on page 6-16 ).
Procedure:
•
Select menu option System > Configuration > TDM Configuration ( Figure 160 ).
•
Set the TDM Channel Loopback n attribute (where “n” is in the range 1 to 8) to Copper or
Wireless (
Table 171 ).
•
Click Submit Updated TDM Configuration.
•
Perform loopback tests. The System Summary page displays alarms indicating the
presence of loopbacks on each affected TDM channel (
Alarms on page 7-20 ).
•
Set the TDM Channel Loopback n attribute (where “n” is in the range 1 to 8) to None ( Table
171 ).
•
Click Submit Updated TDM Configuration.
Checking for 1000BASE-T operation
If the ODU port has negotiated a link at 100BASE-T, the NIDU will not send or receive TDM data
and will not bridge customer data traffic. Check that the Ethernet drop cable between the ODU
and the PSU, and the network cable between the PSU and the NIDU have successfully
negotiated operation at 1000BASE-T. On the System Status page, review Main PSU Port Speed
and Duplex (
Figure 208 ) and confirm that it is set to 1000 Mbps Full Duplex.