User's Manual

Table Of Contents
8 Web Page Reference
154
Figure 66 - Telecoms Data Entry
Telecoms Interface: May be either T1 or E1, reflecting the Installation Wizard setting.
Line Code: Displays the Line Code setting for each channel. The Line Code configuration
must match the configuration of the connected equipment and may be set using the
Installation Wizard.
Cable Length: The Cable Length setting is applicable in T1 mode only and shows the cable
length specified in the installation wizard.
Loopback: Allows the T1 or E1 data stream to be looped back at the copper or wireless
interface. During normal operation the loopback must be set to "None". It may be helpful
during installation to test the telecoms links by performing loopback connections.
A "Copper" loopback connects the received data on a given telecoms interface to the transmit
interface. A "Copper" loopback may be used, in conjunction with a Bit Error Rate Tester, to
confirm that the correct connections have been made to the ODU. This mode cannot be used
for resistance tests as it is only capable of looping back valid telecoms signals.
A "Wireless" loopback sends the telecoms data received across the wireless link back across
the link on the same Telecom channel. The link may be checked using, for example, a Bit
Error Rate Tester to ensure that no errors are detected.
A typical T1 or E1 installation might include a "Copper" loopback on the local unit followed by
a "Wireless" loopback on the remote unit.