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NEC ALARM DETAIL STM-1 ……………………………………….……STM CARD FAULTYS STM-1 DMR……………………………….....MUX PROBLEM OF STM STM-(1) E-BER (DMR) …….………MUX PATCH CORD PROBLEM HIGH BER, LOW BER……………………...…INTERFERENCE (IDU) STM-1- LOS (MUX)…...MUX PROBLEM / FREQUENCY PROBLEM/ sap problem STM-1-UAE (MUX) …..MUX PROBLEM / FREQUENCY PROBLEM// sap problem STM-1-UAE (DMR).................................………..BETWEEN MUX AND IDU (E1 NOT PROVIDED TO IDU) BUT LINK IS PROPER STM-1-LOF (DMR) ……………..FAR-END E1 IS NOT CONNECTED TO NEAR-END. STM-1-SD (DMR)……………..OPTICAL PATCH CORD PROBLEM CALL BUTTON……………………..IF BUTTON……………………..IF LINK IS PROPER WORKING THEN A BEEP IS HEARING ON EITHER END BY PRESSING THE CALL BUTTON ONLY ODU RED LED …………..…ODU, CONNECTOR,IF FAULTY ONLY MD RED LED…………..………INTERFERENCE PROBLEM BOTH ODU AND MD RED LED…………..THEN LINK BREAK B/W FAR END AND NEAR END OR FAR END IDU OR ODU FAULTY OR THEIR POWER OFF. EOW………………………FOR COMMUNICATION B/W FAR END AND NEAR END BY USING HEAD PHONE CONNECTED IN EOW PORT.
