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virtual concatenation group (VCG)

In Next Generation SDH( NG-SDH), the payloads of many small, virtual SDH containers are combined into one large group, the Virtual Concatenation Group (VCG), via Virtual Concatenation ( VCAT).

This procedure was specified by the International Telecommunication Union( ITU) in Recommendation G.707. According to this recommendation, the virtual small containers( VC) may have three different sizes: VC-12, the smallest data stream, is 2 Mbit/s; VC-3 is 50 Mbit/s; and VC-4 is 150 Mbit/s. After that, a 10 Mbit/s data stream would be split into four VC-12 containers.

The Virtual Concatenation Group is treated as a group of independent Virtual Concatenation, so each virtual concatenation occupies its own time slot across the end-to-end link.

Englisch: virtual concatenation group - VCG
Updated at: 13.11.2020
#Words: 112
Links: indium (In), synchronous digital hierarchy (SDH), next generation SDH (NG-SDH), virtual, vertical interconnect access (PCB) (via)
Translations: DE

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