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What is the meaning of klm SDH technology in optical transmission?
Wiki User
∙ 12y ago
This means that an engineer must be able to identify specific channels at any network node.
For example a 2.048Mbit/s tributary may be required to be outputted on a SDH aggregate from a Nortel TN- 4XE switch.
The way a channel is identified at a node is by the use of KLM notation system.
This system allows for the identification of the associated interface card slot within the equipment, the STM and the applicable TUGs/TUs within that STM.
The notation details the following information:· Associated card slot within equipment.
· Associated port on card.
· Associated STM frame.
· Associated TUG3 within STM frame.
· AssociatedTUG2 within TUG3.
· Associated TU within TUG2.
For example, a STM-1 tributary is being connected to port 1 of a
2 p ort STM-1 tributary card.
The actual channel that we are concerned with within the STM-1 frame is channel 49.
The first part of the notation to be used must indicate the slot number of the tributary card.
It can also be seen that it is connected to port 1.
The notation used to indicate this would be "S1-1".
Note: if port 2 was being used it would be "S1-2".
The next part of the notation indicates the STM frame associated J1 byte.
As this is a single STM-1 frame there is only a single J1 byte.
Therefore the notation used would be "J1".
Note: If this was a STM-4 frame and we where interested in the second STM-1 frame held within it the notation would be "J2" etc.
The final part of the notation is to indicate the TU-12, TUG-2 and TUG-3 associated with channel 49.
Now it can be seen that TUG-3 #3 is the one that is associated with Channel 48.
Also it can be seen that the TUG-2 associated with TUG-3 #3 that will carry this channels will be TUG-2 #2. Finally it can be seen that the TU-12 container that would be used to contain this channel within the TUG-2 #2 frame would be TU-12 #3. Therefore, as the notation lists the TUG-3 followed by the TUG-2 and finally by the TU-12 the notation in this case would be "323".
This means that the full notation string to indicate channel 48 of the STM-1 frame connected to port 1 of a card in shelf 1 of a 4XE would be "S1-1-J1-323"
Although this notation looks relatively complex once the fundamental rules are grasped it becomes reasonably easy to implement.
REMEMBER THE NOTATION LISTS THE TUG-3
FOLLOWED BY TUG-2 AND FINNALLY THE TU-12.
Wiki User
∙ 12y ago
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Alarms which are generated due to the failure of any link or card on the Sdh equipments are sdh alarms.
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Difference bw sdh and pdh?
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Define Synchronous Digital Hierarchy?
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What is SDH alarms?
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Difference bw pdh sdh funtionality layout of Pakistan?
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What are some popular linen items of SDH?
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What is alarmed?
Alarms which are generated due to the failure of any link or card on the Sdh equipments are sdh alarms.
