Next-Gen - Virtual Concatenation (Vcat) - EXFO FTB-8510B Guia Del Usuario

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Next-Gen - Virtual Concatenation (VCAT)

SONET/SDH multiplexing combines low-speed digital signals (DS1, DS2,

DS3 for SONET; E1, E3, and E4 for SDH) with the required overhead to form

building-block frames called STS-1 SPE (SONET) and STM-1 (SDH). To

enable higher-bandwidth transport than these basic rates allow

individually, multiple SPEs can be combined and transported across the

SONET/SDH network as a single connection, with the first SONET container

payload pointer set to normal mode and the subsequent payload pointers

set to concatenation mode, thus linking all the units together.

The following table outlines supported contiguous concatenation for both

SONET and SDH. For the SONET standard, these are denoted as STS-Xc,

and for SDH as VC-4-Xc.

FTB-8100 Series Transport Blazer

Payload Capacity

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