sdh-sonet >> RDI Alarm

by Netbot » Mon, 22 Jun 2009 12:45:18 GMT

please tell me the source of the alarm if the alarms pop in the
following manner.

X1-A-B-C-D-X2

X1 and X2 are outside our domain and ABC and D are the SDH nodes, let
say RDI alarms popped-up on all SDH nodes from X1->A, A->B, B->C and C-
>D.

Is X1 is the direction if problem or X2?


sdh-sonet >> RDI Alarm

by Netbot » Mon, 22 Jun 2009 17:02:35 GMT





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Yes all the RDI alarms were popped up at the same time and there was
no event took place at that time, what i understand from your reply is
that "problematic node is X2" nothing had been transmitted from X2
towards X1 so RDI alarm insertion taken place in the reverse
direction. is it?



sdh-sonet >> RDI Alarm

by hhelvooort » Tue, 23 Jun 2009 04:04:03 GMT

Hello Emma,

You replied:


The problematic node is NOT X2.

The problemaqtic node could be X1.
The signal that starts at A is sent to X1 and if this signal is
interrupted
before it arrives at ist destination the destination termination
function
will detect a loss of siganl and consequently send an RDI back to A.

The same for signal send from B and C and D.

So either the connection betweenA and X1 is interrupted or the
connection
at the left of X1 is interrupted.
I node X1 completely fails no RDI will be received by A, B, C and D.

Regards, Huub.

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RDI Alarm

by Netbot » Tue, 23 Jun 2009 12:25:31 GMT




Thanks Huub

Tx of A is problematic towards X1 so in return it sending Path RDI
notification to all the nodes. If Tx and Rx at A is failed it will
raised LOS alarm and sending AIS to all other nodes. is it?



RDI Alarm

by Huub van Helvoort » Sat, 27 Jun 2009 22:48:53 GMT

Hello Emma,





Yes, correct.

Regards, Huub.

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