How can one interpret the very abstract concept of SDH and its components?

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Urukhayy2015-10-07 15:31:01

Computer networks

Urukhayy, 2015-10-07 15:31:01

To make it easier to understand the concept of SDH, as well as its constituent parts - a virtual container, transport and administrative blocks, as well as STM, what can they be compared with? For example, if you take IP routing and network packet exchange, then what is an SDH system container, and what is a virtual container? And how are the IP packet and SDH containers and SDH blocks related?

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Alexey Cheremisin, 2015-10-07
@leahch

I was looking for an analogy for a long time, but I didn’t see anything better than a satellite channel. Well, or an MPEG2TS container. Only the brain will not become cleaner from this ..
If compared with IP networks, then probably not with them, but with ethernet, which has a bunch of VLANs and the Q-in-Q protocol ...

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Valentin, 2015-10-10
@vvpoloskin

Separate concepts. There is SDH, there is PDH. Both can be considered as a link layer protocol (Ethernet). As a vlan there will be a specific timeslot, which can be identified by the KLM or STM number.
Analogy of the virtual container multiplexing hierarchy (vc12) - same as Ethernet: 10base-t, 100base-t, etc. The
comparison is crooked, but visual