Configuring the traffic interfaces | 88
5. Set the QJET interface Clock Source.
One interface port in each terminal can be set to 'primary' and one interface port to 'secondary' (an
error message will appear if you try to set more than one primary source or more than one
secondary source).
A port currently set to primary must be set to 'None' and applied before it can be reset to
secondary.
Note: The terminal clock source is selected in Local or Remote > Terminal > Clocking
6. Set the QJET interface Loopback, if required, to either line-facing (tests E1 / T1 traffic across the
interface card but not across the link) or terminal-facing (tests E1 / T1 traffic across the link).
Note: The E1 / T1 port green LED flashes when the loopback is active.
7. Click Apply to apply changes or Reset to restore the previous configuration.
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