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ericssonmd110 noise

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batm

Technical User
Oct 14, 2003
3
US
Ericsson MD110 BC8, with 4 remote lims. one remote location started to have a noise that is only on the phones during internal calls for brief 2-3 seconds. sound like a modem sound, call completes ok, and will happen to both analog and digital. checked power supply ok, checked all cables ok, does not always appear. 3 out of 7 calls. works ok for external calls.?? any ideas???
 
Hello
Sorry I have not a big esperience, but,
You can test if the noise is only in 1 MAG (DSU)
test call MAG1 <> MAG1, MAG 1 <> MAG 0, MAG 0 <> MAG 0
If only 1 mag have the noise
You can change LSU and/or DSU board
If the noise is in all the lim,
If You have disposition the board
You can change TRU or LPU,
but You have stop the service,

Sorry for mi englis not good
Best regard Paolo
 
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