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RF loop test fault,ericsson 2106

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  • #53354 Reply
    Abdullah Khan


    I am using 6 dtru’s for sector A(Ericsson RBS 2106). 4+8 configuration.First 2 dtru for 900 and last 4 dtru for 1800.I am having Rf loop test fault alarm in the last dtru.Fault (red led) is visible.I have changed that dtru,changed the Tx & rx cable,swapped the cdu that was connected with that dtru,but still the alarm is coming at the same position.I have installed the idb again but i could’nt figure out that what is the problem.I need assistance.

    Abdullah Khan

    #53355 Reply
    Asif A

    Hi Abdullah,

    1st check loop test and verify the connection b/w transcoder and a specific TS in BTS.In order to perform test TS must be in state COM(block).
    After blocking TS initiate Loop test by following command.


    Mostly it happen when Abis E1 TS mismatch if VSAT media is using otherwise check TRC links may be fluctuating or Down.

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Reply To: RF loop test fault,ericsson 2106
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