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E1 cable issue

E1 cable issue

Created: Feb 28, 2022 09:23:43Latest reply: Feb 28, 2022 12:07:50 144 7 0 0 0
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Dear all,
when perform inloop port 4 in slot OSN3500 and connect to SDH analyzer to check E1 signal I found alarm is LOS, how to clear it? thanks

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(1) (0)
Unicef
MVE Created Feb 28, 2022 09:43:12

Dear Friend! hope below can help:

Root Cause:
May be the PQ1 card or D12S card is fault
May be the E1 (120) cable or connector is fault
Suggestions:
- Check all the possible causes: card, connector, cable... and test each case until find the reason and have the solution to fix.

Thanks!
View more
  • x
  • convention：

user_4396693
user_4396693 Created Feb 28, 2022 14:27:33 (0) (0)
I will try thanks  

Recommended answer

(1) (0)
Malik3000
MVE Created Feb 28, 2022 12:07:50

Hello .
There are many possible causes .
To find the problem start with making hard loop back in the SDH E1 fram toward the OSN3500 to check the SDH wiring ,interface & board.
if the TALOS cleared , make hard loop in the end of the tester connector toward the SDH OSN3500 to check the device connectors .

-check the setting of the device make sure of the impedance (75 or 120 ohm) .
- Check the framing (PCM 30CH or PCM 31CH or PCM 30CH with CRC) or Unframed .
It is better to set it unframed..

You can also use LED( light emitting diod ) to check the signal ..
The LED should give light in the TX wire

Regards
View more
  • x
  • convention：

user_4396693
user_4396693 Created Feb 28, 2022 14:27:01 (0) (0)
good to. know  
All Answers
(0) (0)
2#
liqiang185
liqiang185 Admin Created Feb 28, 2022 09:27:30

Dear friend!
Can you provide topology information? Without detailed topology information, we cannot provide an accurate solution.
Thank you!
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  • convention：

user_4396693
user_4396693 Created Feb 28, 2022 09:30:46 (0) (0)
T2000 software and NG SDH analyzer  
liqiang185
liqiang185 Reply user_4396693  Created Feb 28, 2022 09:37:35 (0) (0)
What board is installed in slot 4 and where is the SDH analyzer connected?  
(1) (0)
3#
Unicef
Unicef MVE Created Feb 28, 2022 09:43:12

Dear Friend! hope below can help:

Root Cause:
May be the PQ1 card or D12S card is fault
May be the E1 (120) cable or connector is fault
Suggestions:
- Check all the possible causes: card, connector, cable... and test each case until find the reason and have the solution to fix.

Thanks!
View more
  • x
  • convention：

user_4396693
user_4396693 Created Feb 28, 2022 14:27:33 (0) (0)
I will try thanks  
(1) (0)
4#
Malik3000
Malik3000 MVE Created Feb 28, 2022 12:07:50

Hello .
There are many possible causes .
To find the problem start with making hard loop back in the SDH E1 fram toward the OSN3500 to check the SDH wiring ,interface & board.
if the TALOS cleared , make hard loop in the end of the tester connector toward the SDH OSN3500 to check the device connectors .

-check the setting of the device make sure of the impedance (75 or 120 ohm) .
- Check the framing (PCM 30CH or PCM 31CH or PCM 30CH with CRC) or Unframed .
It is better to set it unframed..

You can also use LED( light emitting diod ) to check the signal ..
The LED should give light in the TX wire

Regards
View more
  • x
  • convention：

user_4396693
user_4396693 Created Feb 28, 2022 14:27:01 (0) (0)
good to. know  
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