Sdh - Multiplex Section Overhead (Msoh) - EXFO FTB-8510B Guia Del Usuario

Glossary

SDH - Multiplex Section Overhead (MSOH)

SDH - Multiplex Section Overhead (MSOH)
This section contains multiplex section overhead information (MSOH)
processed by all SDH equipment along a network path, excluding signal
regenerators.
H1 and H2: Pointer
H1 and H2 bytes are combined to form a pointer indicating where the VC
(Virtual Container) framed begins within each SPE.
H3: Pointer Action
H3 is an extra byte used to compensate for the SPE timing variation. The H1
and H2 pointer tell the receiver when the H3 pointer is used. This byte must
be defined in every STM-1 of an STM-N signal in the event of negative
justification, otherwise it is not defined.
B2: MS BIP-N*24
The MS BIP-N*24 (Bit-Interleaved Parity) byte provides line error
monitoring. The byte is calculated by performing a routine even-parity
check over all bits of the MSOH and the STM-N frame of the previous
STM-N frame. Note that the RSOH is not used to calculate the parity check.
This byte must be defined in every STM-1 of an STM-N signal.
636
FTB-8100 Series Transport Blazer